7RUM CRIMP OR NOT

[valleysnyper]

I have a 7RUM I'm going to start reloading for, is a crimp required or recommended? My other rifles I've reloaded for I never did. Thanks in advance

 

[Lefty7mmstw]

I don't crimp my 7rum ammo

 

[comfisherman]

Nor do I even on my weight weenie 7 run.

 

[CBH Australia]

But some do,,,

 

[Aussie Hunter Steve]

No.

 

[Citified]

You may get some other opinions here but I never crimp even up to 300 RUM.

 

[valleysnyper]

Ok thanks everyone

 

[Outdrmn]

Butter Bean has very informative post on this topic "Why I crimp". It has definitely improved the accuracy of all my hand loads.
Thanks again Bean!!!

 

[Citified]

I highly respect Butter Beans' post and vowed I might try his process out one of these days. You should definitely look up his pst post on the subject. Processes change with time.

 

[jessej]

Coincidentally, I crimped for the first time ever yesterday. The load was shooting 2-1/2" groups at 300 yards. A simple crimp changed it to 7/8" at 300 yards.
300 rum

I think crimping success will depend on the pill you're pushing

 

[NW Hunter]

This was my first attempt using Butterbean's method.
It also worked on my 65x284 & 300wm. It also calmed down ES.

 

[valleysnyper]

Here is my 200 yd group, just wondering about crimp because of amount of recoil

 

[just_jon]

I started crimping when I switched over to hammer bullets three years ago and later expanded to other bullet manufacturer's. I found crimping reduced group sizes, often quite considerably, in in the vast majority of cases and and have not had a single case where crimping has increased group size.

 

[Citified]

You know, I guess I'll have to try it!