20" 7mm saum speeds?

[cohunt]

anyone have Muzzle velocity numbers from a rem model 7 with a 20" barrel in the 7 saum??

I can find plenty of MV numbers for 22" rem 7 and longer, but can't seem to find much on the 20" barrels

 

[Buttermilk]

My barrel length is 17.5" (XP-100).

With Berger 168 VLDH bullets, I've get 2850 FPS using H1000. I also get 2774 FPS with Hornady 162 ELD-X's but with a lower powder charge (simply stopped with my load developement when I hit under 1/2 MOA) using H1000.

With H4831cs, I only get a bit over 2700 fps with the Berger 168 VLDH.

 

[cohunt]

Anyone else with around a 20" 7 saum?

 

[Buttermilk]

The Berger loading manual typically lists the FPS loss/gain per inch of barrel length for barrel length different from their data.

 

[cohunt]

The Berger loading manual typically lists the FPS loss/gain per inch of barrel length for barrel length different from their data.

So would you have that info?

 

[Buttermilk]

I do have that info, but I am currently away from home for at least another month where my manual is.

Typically, Berger lists that velocity difference in the low 20's to low-mid 30's depending on specific cartridge, if I recall correctly.

 

[DocDoc]

25 fps per inch of barrel is a general rough estimate.

 

[Ginga]

I have a 20 inch saum with suppressor. 2775 fps with 168 Berger classic, fed mag primer, 56 grains ar2209 (I think equivalent is h4350) and Norma case. I'm guessing a different powder could provide more speed but good enough for 500-600 yards on deer.

 

[Montanaturbo]

I received the scopes today thank you very much