175 ABLR Loads for 7RM

[officerdare]

Just took over my son’s NIB Savage 7mm RemMag and want to set it up for elk hunting using the 175 ABLR’s I picked up. Anyone worked up any loads for the this combo? Keep seeing other calibers/loads using RL 26 and 33 but couldn’t find any load data on those powders. Thanks.

 

[DrMike]

Cartridge : 7 mm Rem. Mag.(SAAMI)
Bullet : .284, 175, Nosler AccuBond LR 58517 G7
Useable Case Capaci: 71.106 grain H2O = 4.617 cm³
Cartridge O.A.L. L6: 3.290 inch = 83.57 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Alliant Reloder-26

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step    Fill. Charge   Vel.  Energy   Pmax   Pmuz  Prop.Burnt B_Time
 %       %    Grains   fps   ft.lbs    psi    psi      %        ms

-20.0   75    52.64   2338    2123   29818  11081     97.3    1.710
-18.0   77    53.96   2398    2234   31938  11365     98.2    1.667
-16.0   78    55.27   2457    2347   34218  11623     98.9    1.625
-14.0   80    56.59   2517    2462   36672  11854     99.4    1.585
-12.0   82    57.90   2576    2578   39314  12056     99.8    1.533
-10.0   84    59.22   2634    2697   42160  12226    100.0    1.484
-08.0   86    60.54   2692    2817   45204  12366    100.0    1.437
-06.0   88    61.85   2750    2938   48438  12496    100.0    1.391
-04.0   90    63.17   2806    3060   51891  12623    100.0    1.348  ! Near Maximum !
-02.0   92    64.48   2862    3183   55585  12745    100.0    1.306  ! Near Maximum !
+00.0   93    65.80   2918    3308   59536  12864    100.0    1.266  ! Near Maximum !
+02.0   95    67.12   2973    3434   63767  12979    100.0    1.227  !DANGEROUS LOAD-DO NOT USE!
+04.0   97    68.43   3027    3561   68300  13090    100.0    1.190  !DANGEROUS LOAD-DO NOT USE!
+06.0   99    69.75   3082    3690   73162  13197    100.0    1.154  !DANGEROUS LOAD-DO NOT USE!
+08.0  101    71.06   3136    3821   78382  13299    100.0    1.120  !DANGEROUS LOAD-DO NOT USE!
+10.0  103    72.38   3189    3953   83993  13396    100.0    1.087  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 93 65.80 3030 3568 73717 12389 100.0 1.162 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 93 65.80 2743 2924 45888 13444 99.4 1.409

Cartridge : 7 mm Rem. Mag.(SAAMI)
Bullet : .284, 175, Nosler AccuBond LR 58517 G7
Useable Case Capaci: 71.106 grain H2O = 4.617 cm³
Cartridge O.A.L. L6: 3.290 inch = 83.57 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Alliant Reloder-33

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step    Fill. Charge   Vel.  Energy   Pmax   Pmuz  Prop.Burnt B_Time
 %       %    Grains   fps   ft.lbs    psi    psi      %        ms

-20.0   85    61.20   2259    1982   28045  11092     82.8    1.738
-18.0   87    62.73   2327    2104   30160  11559     84.7    1.690
-16.0   89    64.26   2397    2232   32456  12017     86.5    1.643
-14.0   91    65.79   2467    2365   34952  12462     88.3    1.596
-12.0   93    67.32   2538    2504   37670  12892     90.0    1.547
-10.0   96    68.85   2611    2648   40633  13303     91.6    1.491
-08.0   98    70.38   2683    2798   43867  13693     93.0    1.437
-06.0  100    71.91   2757    2954   47406  14057     94.4    1.385
-04.0  102    73.44   2831    3114   51284  14394     95.6    1.334
-02.0  104    74.97   2906    3281   55543  14699     96.7    1.285  ! Near Maximum !
+00.0  106    76.50   2981    3452   60230  14971     97.6    1.237  ! Near Maximum !
+02.0  108    78.03   3056    3629   65404  15205     98.4    1.192  !DANGEROUS LOAD-DO NOT USE!
+04.0  110    79.56   3131    3810   71125  15399     99.0    1.147  !DANGEROUS LOAD-DO NOT USE!
+06.0  113    81.09   3207    3997   77473  15550     99.5    1.104  !DANGEROUS LOAD-DO NOT USE!
+08.0  115    82.62   3283    4188   84485  15655     99.8    1.063  !DANGEROUS LOAD-DO NOT USE!
+10.0  117    84.15   3359    4384   92270  15712    100.0    1.022  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 106 76.50 3167 3898 76545 14658 100.0 1.122 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 106 76.50 2728 2891 46699 14155 89.1 1.386


Cartridge : 7 mm Rem. Mag.(SAAMI)
Bullet : .284, 175, Nosler AccuBond LR 58517 G7
Useable Case Capaci: 71.106 grain H2O = 4.617 cm³
Cartridge O.A.L. L6: 3.290 inch = 83.57 mm
Barrel Length : 24.0 inch = 609.6 mm

Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 60000 psi, or 413 MPa
or a maximum loading ratio or filling of 112 %
These calculations refer to your specified settings in QuickLOAD 'Cartridge Dimensions' window.
C A U T I O N : any load listed can result in a powder charge that falls below minimum suggested
loads or exceeds maximum suggested loads as presented in current handloading manuals. Understand
that all of the listed powders can be unsuitable for the given combination of cartridge, bullet
and gun. Actual load order can vary, depending upon lot-to-lot powder and component variations.
USE ONLY FOR COMPARISON !

32 loads produced a Loading Ratio below user-defined minimum of 90%. These powders have been skipped.

Powder type          Filling/Loading Ratio  Charge    Charge   Vel. Prop.Burnt P max  P muzz  B_Time
                                      %     Grains    Gramm   fps     %       psi     psi    ms
---------------------------------  -----------------------------------------------------------------
Vihtavuori N570                    105.6     73.0     4.73    2988    97.2    60000   15117   1.239  ! Near Maximum !
Alliant Reloder-33                 106.1     76.4     4.95    2977    97.6    60000   14958   1.240  ! Near Maximum !
Hodgdon H870                       112.0     75.8     4.91    2966    98.6    59730   14625   1.244  ! Near Maximum !
Norma 217                          112.0     72.3     4.68    2962   100.0    59836   13735   1.254  ! Near Maximum !
Alliant Reloder-50                 112.0     79.4     5.14    2961    96.9    59001   15239   1.272  ! Near Maximum !
Hodgdon Retumbo                    109.3     72.0     4.67    2958   100.0    60000   13320   1.233  ! Near Maximum !
Alliant Reloder-26                  93.6     65.9     4.27    2924   100.0    60000   12878   1.262  ! Near Maximum !
Norma MRP 2                        104.5     68.5     4.44    2923    99.8    60000   13568   1.256  ! Near Maximum !
Vihtavuori N560                     96.5     64.6     4.19    2917    99.3    60000   13555   1.246  ! Near Maximum !
Alliant Reloder-25                 102.3     66.7     4.32    2914   100.0    60000   12566   1.243  ! Near Maximum !
Norma MRP                           94.7     64.7     4.20    2912   100.0    60000   13045   1.253  ! Near Maximum !
Accurate MAGPRO                     96.8     67.5     4.37    2912    98.5    60000   13720   1.253  ! Near Maximum !
IMR 7828                           100.9     64.3     4.16    2909    99.6    60000   13130   1.235  ! Near Maximum !
IMR 7828 SSC                        95.4     64.3     4.16    2909    99.6    60000   13130   1.235  ! Near Maximum !
Hodgdon H1000                      105.7     68.5     4.44    2899    99.7    60000   12865   1.229  ! Near Maximum !
Alliant Reloder-22                  96.7     64.1     4.15    2890    99.9    60000   12944   1.252  ! Near Maximum !
Winchester WXR                      99.3     64.4     4.17    2890    99.9    60000   12969   1.253  ! Near Maximum !
Vihtavuori 24N41                   108.0     75.4     4.89    2877    91.7    60000   13670   1.233  ! Near Maximum !
Ramshot Magnum                      96.8     69.1     4.48    2876   100.0    60000   12396   1.248  ! Near Maximum !
Alliant Reloder-19                  93.9     61.5     3.99    2852    99.9    60000   12349   1.247  ! Near Maximum !
Alliant Reloder-23                  98.8     63.4     4.11    2843   100.0    60000   11603   1.264  ! Near Maximum !
Hodgdon H4831                       99.1     63.1     4.09    2836    99.1    60000   12323   1.243  ! Near Maximum !
Hodgdon H4831 SC                    95.3     63.1     4.09    2836    99.1    60000   12323   1.243  ! Near Maximum !
Vihtavuori N170                    108.5     70.3     4.56    2830    95.7    60000   12865   1.263  ! Near Maximum !
Hodgdon US 869                     112.0     78.2     5.07    2822    90.8    56605   13525   1.277  ! Near Maximum !
Hodgdon 50BMG                      112.0     74.5     4.83    2817    86.7    56413   13619   1.276  ! Near Maximum !
Winchester Supreme 780              92.9     64.2     4.16    2811    99.9    60000   11794   1.253  ! Near Maximum !
Vihtavuori N165                     99.1     64.3     4.16    2803   100.0    60000   11533   1.258  ! Near Maximum !
Accurate 3100                       96.9     63.5     4.12    2797   100.0    60000   11371   1.286  ! Near Maximum !
Vihtavuori N160                     99.3     62.4     4.05    2794    99.5    60000   11639   1.250  ! Near Maximum !
IMR 4831                            93.4     58.6     3.80    2793   100.0    60000   11067   1.271  ! Near Maximum !
Hodgdon Hybrid 100V                 91.4     57.9     3.75    2766   100.0    60000   10452   1.264  ! Near Maximum !

 

[SJB358]

Man that should be an excellent set up for elk... RL33 really puts the boots on the 175 ABLR.

 

[officerdare]

Thanks DrMike and SJB358. Trying to find those powders is fun. Have plenty of RL22, H4831sc, I7828ssc, and misc. one pound cans of others on hand. Would you recommend trying the COAL, in increments of - .015, .030, .050 and .100 to find a sweet spot on that bullet?
This is the measurements I ended up with yesterday using the Stoney Point and ensuring the rounds would fit the Savages magazine which measured approx. 3.441”. Used an empty case with a tightened throat to seat the bullets until they just cleared the forward end of the magazine well.
My COAL with the bullet just touching the lands were:
150 ABLR: 3.407
160 AB: 3.344
168 ABLR: 3.407
175 ABLR: 3.408

 

[officerdare]

Thanks DrMike and SJB358. Trying to find those powders is fun. Have plenty of RL22, H4831sc, I7828ssc, and misc. one pound cans of others on hand. Would you recommend trying the COAL, in increments of - .015, .030, .050 and .100 to find a sweet spot on that bullet?
This is the measurements I ended up with yesterday using the Stoney Point and ensuring the rounds would fit the Savages magazine which measured approx. 3.441”. Used an empty case with a tightened throat to seat the bullets until they just cleared the forward end of the magazine well.
My COAL with the bullet just touching the lands were:
150 ABLR: 3.407
160 AB: 3.344
168 ABLR: 3.407
175 ABLR: 3.408

 

[officerdare]

No luck on finding the RL33. Did find RL25 and one can of 26, both being fedexed today. I always measured my rounds using the COAL/SAAMI recommended for my loads, so doing this now off the olive/lands is new territory. Nosler recommended .015 or .030, but I saw in some threads starting off at .50 or .100 for the AB or ABLR’s. Recommendations would be appreciated so I don’t waste a bunch of bullets, etc. in finding a load. Thanks.

 

[Dwh7271]

No experience with that particular bullet but with the 6.5 ABLRs I started .05 off and found a spot with the 129s at almost .1 off. Seems they like a little jump.
IIRC, your OAL with the 175s was around 3.4 or so. Maybe around 3.35? See what happens there. Perhaps load three or four (I like an extra in case I pull one :grin: ) at 3.35, 3.33 , 3.31 and so on. Won't use up too many before one of them shows you something I would bet.
Not beating up on them at all but the ABLRs seem to be a little touchier about depth than the basic ABs.

 

[SJB358]

No experience with that particular bullet but with the 6.5 ABLRs I started .05 off and found a spot with the 129s at almost .1 off. Seems they like a little jump.
IIRC, your OAL with the 175s was around 3.4 or so. Maybe around 3.35? See what happens there. Perhaps load three or four (I like an extra in case I pull one :grin: ) at 3.35, 3.33 , 3.31 and so on. Won't use up too many before one of them shows you something I would bet.
Not beating up on them at all but the ABLRs seem to be a little touchier about depth than the basic ABs.

Dewey is spot on with his observations. Mirrors what I see as well. I'd probably not start any closer than .050" and work back in .020" increments. Once you find the spot it seems to be consistent a little tweaking may be necessary but it should get you close.

BTW that is a very cool signature picture. Scotty

 

[officerdare]

Dewey and Scotty (OooooRah),
Thanks. So just to clarify for any of the ABLR’s which are:
3.407
- .050 to start?
-------
= 3.357 and then do the .020 by adding or subtracting? If I read Dewey correct its subtracting until I hit the .100 mark?
.337
.316
.307

 

[DrMike]

You are correct in your assumption. When I have a load that shows tight standard deviation, I will begin to alter the seating depth. In the scenario you propose, since you are beginning at 0.050 inches off the lands, make the OAL 0.020 inches less (seating the bullet deeper by 0.020 inches) with each test. I begin my tests at 0.100 inches off the lands for bonded core and monolithic bullets, so I will increase OAL by 0.020 inches at first. Just an aside, I have had firing systems that required as much as 0.250 inches off the lands; but those were each extreme cases. Usually, accuracy is reached at or around 0.100 inches off the lands.

 

[officerdare]

Well that experiment ended. Went back to making sure my measurements were right and used the 284 insert and zeroed the calipers. Found the bullets were seating so far out that they basically had nothing to stop them from falling out of the case. Long story, one 7mm modified case is now toast and I’ve had to reorder another. Made sure the bore and chamber were clean, but could not find out what the bullets were now seating so far out of the case mouth compared to several days ago. Correct bullets, correct case, correct rifle. Ahhhhhhhh!

 

[Dwh7271]

If you have an extra from the rifle, you can drill and tap your own case and use it.
Just a thought.

 

[officerdare]

Went to several different stores, but could not find a tap that matches the fine machine treading on the Stoney Point/Hornady Lock N Load. At this point will try the method of blackening the bullet and seating it in a slightly tight case mouth and measure from there.

 

[officerdare]

Testing still in progress. My initial thoughts are the Savage does not care for the 175 ABLR’s or this powder. In testing I loaded up some 175 Partitions and hit on load that gave me about a 1/2” group at 100 yds. I did not do any adjustments to the scope, just allowed the round to impact and group. Will see if I can get a couple of pictures. Just got in some RL25 and 26, so might see what those do.
What I have tried so far in the 175 ABLR:
Powder/Grains/Primer/Case/Distance off Lands/Group Size
RL22/62.5/WLRM/WWS/.020/1”
RL22/ “ / “ / “ /.050/2.25
RL22/ “ / “ / “ /.100/1.00x1.50
Test 2
RL22/62.5/WLRM/WWS/.015/2x2.50
RL22/ “ / : / “ /.020/1.5x1.0

 

[pharmseller]

Max charge of Retumbo gets me just under 3k MV and good accuracy.




P

 

[Fire Hawk]

I have been seeing consistent and excellent accuracy with IMR7828ssc, cci250 primers and Nosler brass. I was dialing my turret and hitting targets to 700 just a week ago. Really pleased and look forward to seeing how they perform on elk.

 

[preacher]

I have had excellent results with R33 in my 26" 7mm Rem Mag factory 700 barrel. I got outstanding results with the Sierra 175BT but dismal with the 175 ABLR. I got over 3000fps with it, but accuracy was still poor. I just think a faster twist than 9.25" is what's needed for this long puppy. No sweat, my next bullet to work up is the 175 Partition, but I sure am proud of my Sierra 175 load. BTW, for decades all I have used to adjust my seating depth is a wooden dowel rod, a fine point ink pen and a caliper, ha. I use a shorter piece to barely keep the bullet against the lands when I touch it with the barrel dowel. I also make sure my bolt is cocked when I measure to the bolt face to muzzle to make sure the firing pin isn't protruding any. Just a quirk of mine, but I'm only an ex Army Buck Sgt, I expect more from Marines!!