7mm Rem Mag Quickload Request

[Joe C.]

Good afternoon. Could one of you run a Quickload for me if you have time?

7mm Remington Magnum
Ramshot LRT
180gr Berger Hybrid Target
OAL 3.450”
26” barrel rifled 1:8

 

[DrMike]

Cartridge          : 7 mm Rem. Mag.(SAAMI)
Bullet             : .284, 180, Berger Hy Tgt G7 #28407
Useable Case Capaci: 70.939 grain H2O = 4.606 cm³
Cartridge O.A.L. L6: 3.290 inch = 83.57 mm
Barrel Length      : 26.0 inch = 660.4 mm
Powder             : Ramshot LRT

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% 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

-10.0   97    68.31   2600    2701   41423  11645     86.3    1.550
-09.0   98    69.07   2635    2774   42962  11834     87.1    1.522
-08.0   99    69.83   2670    2849   44567  12020     87.9    1.496
-07.0  100    70.59   2705    2925   46241  12203     88.7    1.470
-06.0  101    71.35   2741    3003   47986  12382     89.4    1.444
-05.0  102    72.11   2777    3082   49809  12557     90.1    1.419
-04.0  103    72.86   2813    3163   51713  12728     90.8    1.394
-03.0  104    73.62   2849    3245   53701  12894     91.5    1.369  ! Near Maximum !
-02.0  105    74.38   2886    3328   55780  13055     92.2    1.345  ! Near Maximum !
-01.0  107    75.14   2922    3413   57955  13211     92.8    1.321  ! Near Maximum !
+00.0  108    75.90   2959    3500   60230  13362     93.4    1.298  ! Near Maximum !
+01.0  109    76.66   2996    3587   62607  13507     94.0    1.275  !DANGEROUS LOAD-DO NOT USE!
+02.0  110    77.42   3033    3677   65112  13646     94.6    1.253  !DANGEROUS LOAD-DO NOT USE!
+03.0  111    78.18   3070    3768   67730  13778     95.1    1.230  !DANGEROUS LOAD-DO NOT USE!
+04.0  112    78.94   3108    3860   70478  13904     95.7    1.208  !DANGEROUS LOAD-DO NOT USE!
+05.0  113    79.70   3145    3954   73364  14023     96.2    1.187  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 5% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 5% relative to nominal value:
+Ba    108    75.90   3062    3746   66854  13594     96.7    1.240  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba    108    75.90   2844    3233   54117  12932     89.1    1.364  ! Near Maximum !

 

[Joe C.]

Thanks Doc! That looks pretty promising.

These will be my first loads with LRT. I have a ladder loaded to shoot tomorrow. Pulling from Hodgdons site I loaded a few 3 round sets around what I figured would be upper middle loads, hoping to get lucky and have bug holes land in my lap. They are .015” off the lands at 3.450” so I have some freedom with seating depth. We‘ll see what the rifle, targets, and Magnetospeed tell me.

EDIT: If LRT doesn’t work out I’ll move on to Staball HD. 7828 and RL25 treat me well also.

 

[desertcj]

Keep us posted. I'm watching for your results. Interested in lrt and staball HD. 7828 is pretty good but might be a little fast for 180s. RL25....pass...lol

 

[Joe C.]

Keep us posted. I'm watching for your results. Interested in lrt and staball HD. 7828 is pretty good but might be a little fast for 180s. RL25....pass...lol

Kinda surprised to hear that for RL25. I was able to put together a very accurate load shooting the 175gr ELD-X over 67.5 grains of RL25. When I’m having a good day at the bench it will give sub 1/2” groups with velocity of 3003 fps average. But I’ll be sure and pass on what I get with LRT.

 

[RL338]

Kinda surprised to hear that for RL25. I was able to put together a very accurate load shooting the 175gr ELD-X over 67.5 grains of RL25. When I’m having a good day at the bench it will give sub 1/2” groups with velocity of 3003 fps average. But I’ll be sure and pass on what I get with LRT.

Can’t argue with those results.

 

[desertcj]

Kinda surprised to hear that for RL25. I was able to put together a very accurate load shooting the 175gr ELD-X over 67.5 grains of RL25. When I’m having a good day at the bench it will give sub 1/2” groups with velocity of 3003 fps average. But I’ll be sure and pass on what I get with LRT.

I say that only because of availability but also not "temp stable" I don't think? I suppose the "availability" could be said about my go to H1000 though as well...

 

[Joe C.]

Been a while with my 7mm Rem Mag but I got a little over 3k fps from a 26” X-Caliber barrel and a 76.5 grain charge of LRT today with 175 grain ELD-X bullets loaded to 3.335” OAL, .020” off the lands. I didn’t get any pressure indications but didn’t try and push higher, and was happy with the velocity at 56 degrees temps today. I’ll work with it for groups the next time at the range. The 180 grain Hybrids topped at 2986 with the same charge weight, without pressure signs as well. Velocities fell perfectly in line with the Quickload Dr Mike was kind enough to look up.

 

[SJB358]

That’s a heckuva great load. Nothing left on the table there.

 

[Joe C.]

The powder builds velocity very smoothly. There were no spikes whatsoever. I’ll get a picture of the page from my load book to show it. No bumps along the way at all.

 

[Joe C.]

This is from my CDL, the X-Caliber barrel was a shade faster

 

[SJB358]

It’s hard to beat the old 7 Rem. Still one of the best.

LRT sounds excellent

 

[Joe C.]

I still need to check it when it’s warmer but it has potential. Velocity gains were gradual and smooth. I think it may work out. Also looking at the MSDS it looks to only have three ingredients. Just a straight forward ball powder. I did however add TubbDust to it.

 

[SJB358]

I have always meant to grab some. So much good powder out there now.

 

[Joe C.]

I agree. We have more great powders we can use now than ever before. It makes it difficult to choose one in particular.

 

[jimbires]

It’s hard to beat the old 7 Rem. Still one of the best.

LRT sounds excellent

I've spent a bunch of money trying to find something I like better , but my 7 Rem Mag is the first rifle I pack to go away hunting .
it just keeps gettin it done .

I was starting to work with RL26 when the powder shortage hit . since then a few more powders showed up , that have my interest , one being "Grand " . Joe is sure making a strong case to give "LRT" a try too .

 

[SJB358]

I've spent a bunch of money trying to find something I like better , but my 7 Rem Mag is the first rifle I pack to go away hunting .
it just keeps gettin it done .

I was starting to work with RL26 when the powder shortage hit . since then a few more powders showed up , that have my interest , one being "Grand " . Joe is sure making a strong case to give "LRT" a try too .

Same here Jim. A 7 Rem was my first BG rifle. I used it for woodchucks, deer, bear, crows, moose, coyotes, caribou. If I was a smart guy, I would have had one built like my Mashburn and been a happy camper. The Mashburn is just about everything I need but the 7 REM would have been just as great. I still keep the old Brownell around and shined up though since I can’t stand being without a good 7RM.

 

[Joe C.]

The thing I like about this load is that it doesn’t feel like I’m leaning too hard into it. I know it’s definitely a top load but it gives a push rather than a slap when you pull the trigger. Have any of you pulled the trigger and just “felt” like you’re pushing it? This doesn’t feel that way. Maybe I’m nuts, I don’t know.