7 GNR, does anyone have chronographed
Tom S
[subject]
Sunday, January 12, 2020, 07:24 (2417 days ago)
Velocities with a 120 grain bullet in a 12” barrel?
Thanks for your indights
It was really easy to hit 2400 fps
WB
[subject]
Sunday, January 12, 2020, 08:14 (2417 days ago) @ Tom S
with about any bullet. My choice for deer type critters is the Nosler 120 BT. I shot a couple nice critters at the Y-O with it, no drama. Basically a pistol version of the 7x57. I liked H322 but several powders work well, hard to mess it up. I have a 12"(rifled)+2" braked barrel for the Contender.
I was using once fired .30-30 brass run FL and fireformed with a 10% reduced load. They all went over 2200 fps and shot into the same hole, might as well hunt with them forming brass. My loads showed a brilliant muzzle flash and it was fun shooting at public ranges. It freaked everyone out, looks like flash photography and a thunderous boom with the brake. Recoil is seriously like a .223, none at all. It's amazing.
This was from when I first got it, maybe 2005-6?
![[image]](images/uploaded/202001121507455e1b36411bafa.jpg)
I forgot, my hunting partner at the Y-O had a JDJ
WB
[subject]
Sunday, January 12, 2020, 08:18 (2417 days ago) @ WB
barreled rig. It was, I think, a 7mm JDJ also on the .30-30 case. JD had a half dozen 7mm rounds searching for the perfect one. We found JD's cartridge could be fired in Gary's 7mm GNR but not the other way around. We thought it humorous.
Very helpful thanks
Tom S
[subject]
Sunday, January 12, 2020, 08:42 (2417 days ago) @ WB
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Nice FLASH photography
Sunny
[subject]
Sunday, January 12, 2020, 10:50 (2417 days ago) @ WB
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This is a 14" barrel, deduct about 70 fps for the 2" shorter
Sean Harper
[subject]
Monday, January 13, 2020, 05:36 (2417 days ago) @ Tom S
barrel.
**Sierra 120 SP CHRGE VELOCITY DEG
H322 32 2399 45
33 2455
34 2501
MAX 35 2582 MAX v accurate
36 2652
W748 39 2367
40 2388
41 2445
42 2577 accurate
43 2634
AA2015 34 2359
35 2440
36 2470
MAX 37 2481 MAX
AA2230 35 2516
36 2553
MAX 37 2615 MAX accurate
38 2693
?? looks like the info did not post like I had it
Sean Harper
[subject]
Monday, January 13, 2020, 05:38 (2417 days ago) @ Sean Harper
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I have the same setup as you.
Gus S.
[subject]
Monday, January 13, 2020, 07:19 (2416 days ago) @ Tom S
I'm shooting Hornady flat based 139s at 2300. The only reason I chrono'ed that load was to build a little more confidence for longer shots. So, making 120s do 2400 should be easy. However, don't get hung up on it. My 30-30 shoots 150 Round Nosed bullets at 2200 and kills whatever I'm good enough to hit right out to 200 yards too.
Tom, as Gus said below, don'y get all worked up over
Gary Reeder
[subject]
Monday, January 13, 2020, 14:54 (2416 days ago) @ Tom S
speed. Speed doesn't kill, accuracy kills. Of all my handguns that I hunt with all over the world, I personally have not chrono'd any of them. Any velocity figures I might post comes from Sean Harper who does all my ballistic testing. So I have an ideas of how fast that bullet is going but the exact velocity is not something I ever worry about. It is really easy to get hung up on velocity figures. My recommendation is forget all that and just concentrate on putting the bullet where it needs to be. Shot placement is much more important than velocity.