Do Retumbo type powder cause larger recoil?

[AlexF]

-- I've posted this in precision rifle but should have posted here --
Hi, I had recoil issues with a 270 WSM load which used a case full of Retumbo to drive a 165gr VLD at 2900fps.
I did a very interesting experiment: I loaded a 243 Win 105gr 6mm A-Max at around 2700-2800fps using Varget, H4831 and Retumbo. My 243 Win has a 22" barrel (my 270 WSM has a 24" barrel)

The results:
Varget recoil was minimal
H4831 recoil was minimal
Retumbo recoil was much larger, including barrel jumping and a large muzzle blast!

This is exactly what I got from my 270 WSM load only on a grander scale!
I guess that Retumbo needs a long 27-30" barrel and that barrel pressure is very high at the muzzle.

I'd like to know if anyone had a similar experience with slow burning powders,
Alex

 

[B]

It's possible considering different pressure curves but it shouldn't be too noticeable I'd think? I know I get a much larger muzzle blast from certain pistol powders.

 

[SandRoad]

The total recoil is exactly the same, however felt recoil might be a little different, don't know if you would really notice it. Also, a huge muzzle blast can make it seem that that there is more recoil.

 

[cam1936]

Increased muzzle blast will be noticeable from a slow powder like retumbo. More grains of powder will increase recoil, but only slightly. I'm thinking the increased muzzle blast is just making it appear like it's recoiling more because of the increased bang.

 

[vviking]

I'd like to know if anyone had a similar experience with slow burning powders,
Alex[/QUOTE]


Yeah ... noticed that too.
Recoil seems heavier, but more of a push and less of a slap.
R22 and Retumbo make the 6.5x55 and 6.5/06 really BOOM.
The fireball, on a moonlit winter night's steel gong shot, stirs a riflemans soul.

Love the stuff.

 

[Andy]

Part of the recoil calculation aside from bullet weight and MV includes the weight of the powder being burned, so yes it affects recoil. You effectively add powder weight to bullet weight, as both are being expelled in a direction opposite to the shooter's shoulder.