7mm Mauser 160 PT and RL19

[PJGunner]

"I think I would like to have a 280 Featherweight, like my boys 7mm. Be a good packing rifle."

Me too! :wink: I do have the FWT in a push feed 7x57 though. It has a 2x7 Leupold on it and I absolutely love that rifle. Currently I'm working with the 120 and 140 gr. Barnes TSX bullets. It seems to like the 120's but the 140's not so much. My .280 Rem thought seems to like the 140's so no big loss if the M70 doesn't like them.
Paul B.

 

[lefty315]

Not quite the same load but I loaded 160 grain Accubonds in my Ruger #1 in 7x57 to 2750 fps. They worked great in Africa and there wouldn't be much you couldn't take with your load.

 

[Oldtrader3]

Karamojo Bell killed 5000 elephants (or how many ever it was) with a .275 Rigby (7mm Mauser) and 175 grain FMJ bullets.

 

[SJB358]

Not quite the same load but I loaded 160 grain Accubonds in my Ruger #1 in 7x57 to 2750 fps. They worked great in Africa and there wouldn't be much you couldn't take with your load.

Lefty, I kinda thought about you when making this load up. Couldn't remember what you used though. I remember thinking it was a good one...

 

[lefty315]

I ended up using IMR 4350 for my load. It's a little over book but I see no pressure signs and holds good accuracy.

 

[spires5d]

Nice shooting fellow. That's real fine for a 7mmMauser. I'm shooting a 7Mauser out of an old war rifle and I like shooting Nosler 140BT'S and 140 CT Silvertips out of mine. I use it to hunt southern whitetails along with my 7mmRem.Mag. Have used a few 160 PT'S in my 7 Mag and they do well. Have a good day.







7mm's Forever and a 30 cal. will "Slam Dunk Um"

 

[SJB358]

I ended up using IMR 4350 for my load. It's a little over book but I see no pressure signs and holds good accuracy.

Gotcha, thank's Lefty.

 

[SJB358]

Seem's like the load is shooting pretty decently, I did load up some test loads with varying seating depths to see if anything about the current load sticks out. Hoping to see a node where it shoots well, everytime.

Once thing I have noticed is the 7mm Mauser seems to stretch more than other cartridges I have messed with. I am bumping the shoulder each time I reload it, but I think I was bumping more than I should have been. I was around .004-.005 and I have backed the die off to .0015-.002..

I figure after I get a decent load worked out for this one, I will get a new batch of 100 or so, and I should have enough on hand for quite awhile.

I do gotta say, I love that little 7mm. Really is becoming a favorite. Hoping my son has a chance to use it a little more this Fall. I am going to try and submit him for a Oregon Youth Hunt. Be sweet to see him shoot a cow elk with it.

 

[muleman]

Scotty,
What do you think your load would do out of a 18.5" barrel? Just thinking about my Ruger 77 RSI.
You could always AI your chamber - ought to eliminate any case stretch.
Scott

 

[Oldtrader3]

It is perfect just like it is!

 

[SJB358]

It is perfect just like it is!

I agree Charlie. I really like it as is. Thinking by tightening up my sizing tolerance a little, should help it out some.

Scott, here is what QL says for an 18.5 barrel.

Cartridge : 7 x 57 mm Mauser
Bullet : .284, 160, Nosler PART SP 16327
Useable Case Capaci: 52.348 grain H2O = 3.399 cm³
Cartridge O.A.L. L6: 3.071 inch = 78.00 mm
Barrel Length : 18.5 inch = 469.9 mm
Powder : Alliant Reloder-19

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 96 46.35 2364 1986 43170 12163 90.7 1.177
-09.0 97 46.87 2393 2034 44626 12337 91.3 1.158
-08.0 98 47.38 2421 2083 46135 12509 91.9 1.140
-07.0 99 47.90 2450 2133 47698 12678 92.5 1.122
-06.0 100 48.41 2479 2183 49317 12844 93.0 1.104
-05.0 101 48.93 2508 2234 50996 13006 93.6 1.087
-04.0 102 49.44 2536 2286 52737 13165 94.1 1.070
-03.0 104 49.96 2565 2338 54543 13319 94.6 1.053
-02.0 105 50.47 2594 2391 56417 13470 95.1 1.036 ! Near Maximum !
-01.0 106 50.99 2623 2445 58361 13616 95.5 1.020 ! Near Maximum !
+00.0 107 51.50 2653 2500 60382 13758 95.9 1.004 ! Near Maximum !
+01.0 108 52.02 2682 2555 62480 13896 96.4 0.989 ! Near Maximum !
+02.0 109 52.53 2711 2611 64658 14029 96.8 0.973 !DANGEROUS LOAD-DO NOT USE!
+03.0 110 53.05 2740 2668 66923 14157 97.1 0.958 !DANGEROUS LOAD-DO NOT USE!
+04.0 111 53.56 2769 2725 69278 14279 97.5 0.943 !DANGEROUS LOAD-DO NOT USE!
+05.0 112 54.08 2799 2783 71728 14397 97.8 0.928 !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 107 51.50 2794 2773 72612 13844 99.6 0.928 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 107 51.50 2471 2170 49276 12986 88.3 1.101

Here is what it says for a 22" barrel

Cartridge : 7 x 57 mm Mauser
Bullet : .284, 160, Nosler PART SP 16327
Useable Case Capaci: 52.348 grain H2O = 3.399 cm³
Cartridge O.A.L. L6: 3.071 inch = 78.00 mm
Barrel Length : 22.0 inch = 558.8 mm
Powder : Alliant Reloder-19

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 96 46.35 2481 2187 43170 10130 92.9 1.297
-09.0 97 46.87 2510 2238 44626 10261 93.4 1.277
-08.0 98 47.38 2539 2289 46135 10390 93.9 1.258
-07.0 99 47.90 2567 2342 47698 10515 94.4 1.238
-06.0 100 48.41 2596 2395 49317 10637 94.9 1.219
-05.0 101 48.93 2625 2448 50996 10756 95.4 1.200
-04.0 102 49.44 2654 2503 52737 10872 95.8 1.182
-03.0 104 49.96 2683 2558 54543 10984 96.2 1.164
-02.0 105 50.47 2712 2613 56417 11092 96.6 1.146 ! Near Maximum !
-01.0 106 50.99 2741 2669 58361 11197 97.0 1.129 ! Near Maximum !
+00.0 107 51.50 2770 2726 60382 11297 97.4 1.112 ! Near Maximum !
+01.0 108 52.02 2799 2784 62480 11393 97.7 1.095 ! Near Maximum !
+02.0 109 52.53 2828 2842 64658 11485 98.0 1.078 !DANGEROUS LOAD-DO NOT USE!
+03.0 110 53.05 2857 2900 66923 11572 98.3 1.062 !DANGEROUS LOAD-DO NOT USE!
+04.0 111 53.56 2886 2960 69278 11655 98.6 1.046 !DANGEROUS LOAD-DO NOT USE!
+05.0 112 54.08 2915 3020 71728 11733 98.8 1.030 !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 107 51.50 2906 3000 72612 11184 99.9 1.030 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 107 51.50 2591 2384 49276 10828 90.6 1.216


So, it looks to me like about 100FPS or so.

I would try it for sure, or like Jim said, drop back to a 150 PT in order to get the speed back up, but then again, for a 160 PT, I can't see 2650 being something any elk, moose or deer would shrug off at anything less than 300 yards.

That RSI is a beauty too. I think I remember seeing pictures of it..

 

[muleman]

Thanks Scotty!
It looks like it doesn't give up much at all. The RSI is a brush and out to 250yds type gun anyways. It handles almost like a sxs shotgun. It makes an excellent blacktail gun.

Scott

 

[SJB358]

Thanks Scotty!
It looks like it doesn't give up much at all. The RSI is a brush and out to 250yds type gun anyways. It handles almost like a sxs shotgun. It makes an excellent blacktail gun.

Scott

Man, heck yeah, no slouch at all Scott. That would be a serious rifle. I see Lee has a bunch of 150 PT's for sale as well. Might need to take a look at them as well.. Can't never have enough PT's on hand!

 

[onesonek]

That is 30-06/180 gr ballistics right there! You're done unless you want an LRAB load..... :twisted:

Not sure why I passed over this thread.
All I could add, is to say it's a grand old round, that don't seem to get much fan fare here in the US.
But I totally agree with Fotis here. I bet you do play with the ABLR Scotty, soon as they come available. I know I will be :!:

 

[SJB358]

That is 30-06/180 gr ballistics right there! You're done unless you want an LRAB load..... :twisted:

Not sure why I passed over this thread.
All I could add, is to say it's a grand old round, that don't seem to get much fan fare here in the US.
But I totally agree with Fotis here. I bet you do play with the ABLR Scotty, soon as they come available. I know I will be :!:

Oh, you know it Dave. Really why I am playing with the 160 PT's some. Wanna see what I can do with that 150 ABLR.