Twist Rate For 175 ABLR

luv2safari

Beginner
Aug 31, 2026
6
7
New here but I'm old and am on other forums. I love Nosler bullets and started reloading in 1959 for 30-06 and 7mm Wby mag.

I have a Kimber Mountain Ascent + Peak on the way in 7 Rem Mag. These have a 26" 1:9.5 twist rate. I want to shoot 175 ABLR for my NV elk hunt this November, but I'm a bit hesitant, since these have a relatively slow pitch. Launched at 2,925 FPS using Grand powder, which I find excellent in over-bore rounds and especially in my 6.5 PRC with 142 ABLRs, will the 9:5 pitch stabilize the 175 ABLR? Shots could exceed 400 yards.

I thank you in advance.
L2S

I edited my post. I mistakenly said the 7Mag would shoot 175 ABLRs at 3,100 fps. I meant to write 2,925 fps.
 
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Welcome to the forum.
The 175 ABLR might be a tab too long to stabilize in a 9.5t. The 168 ABLR could be an alternative.

JD338
 
Thank You! I just did the calculation and it rated 1.57...good to go. :)
Might recheck inputs to match ablr's length with the 9.5 including estimated temp and altitude.

I did this
Used 195 elite hunter snd changed length to 1.54 (according to nosler site info), changed weight to 175, 5k feet of altitude, 40° temp and 3,100fps.

What got was 1.49

30° at 6k was 1.51

The colder the temp toned either more speed or more altitude for the 1.5 minimum if you don't have something with a faster twist.
 
I put the bottom amount in to see how low it could go and still meet 1.50. Answered above^^^^^^^^^

For a closer to actual speed outcome it would be closer to 2,900-2,950 as that's what a 28" barrel.
I just went back and edited my post. Speeds should be about 2,925. You're absolutely correct. I don't know where I came up with 3,100...must have been dreaming...LOL
 
I just went back and edited my post. Speeds should be about 2,925. You're absolutely correct. I don't know where I came up with 3,100...must have been dreaming...LOL
It could be 3,100, but my projected speeds are in a 28" 7saum with max length at 2.870-2.880" depending on mag as it's with a 195eol. With 175's you might be getting those speeds? IIRC nosler data is close to 3k w/24" depending on which powder
 
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