416 Rigby (Big Bore) - To Crimp or Not to Crimp

[BryceM]

I've always crimped my .416 Rigby loads. 400 gr TSX and BBS. It hasn't seemed to hurt accuracy in my CZ550 - right around 1" at 100 yards. YMMV.

 

[Rare Breed]

I am looking for some wisdom on crimping of Big Bore Calibers. I just returned from South Africa where I had the opportunity to speak with several PHs about reloading. The consensus was that they do not crimp .416 Rigby. In fact I was able to inspect several of their reloaded rounds, and they were all uncrimped.

My previous practice has been to crimp, because of the, perhaps only perceived, potential for recoil to move the bullets in the magazine. The PHs said that they had never seen this to be a problem.

I am going back for Buffalo in 2 months, and need to get to work on reloading 416 Rigby. Please let me know your thoughts / experiences. Thank you.

Any big bore in a bolt action I am always going to crimp. For my DRs which has drawn criticism on our forum I do not crimp and have had zero problems

 

[Lone Star Bluegrass]

Light-medium crimp.