300 Blk, to Crimp or not to Crimp

[Geauxfish]

I'm making a trial of 300 Blk loads using Hornady 125gr SST and a variety of powders, H110, Lil'Gun, and 4227. Pretty much following the Hornady manual. The SST do have a cannuel with the OAL around 2.100". I've read a bunch of varying opinions on whether crimping is good or not. I realize this is just internet opinions but I would like to get BS opinions. What's your thoughts on whether this load should be crimped or not?

 

[gmshooter]

I dont on mine

 

[tallwalker]

I don't either. I do pass every case through a Sheridan gauge.

 

[Sig220]

I don't as I have found no difference in the final product. Still have a Lee FC die. Very seldom does my load's OAL seem to line up with the crimping ring found on some like the SST. I found it shot better in my rifle a little longer then the ring would allow. BTW, have seen loaders have more problems by crimping then not and by problems I mean they won't chamber......YMMV.

 

[tallwalker]

I load 300 blk for 3 different rifles all AR and had a bunch of trouble at first trying to find that range where they would all cycle reliably. Very slight diff in the chambers I guess, but once I started gauging them all no problems. When I tried crimping, I found that even that slight pressure could sightly bump the shoulder a hair enough to make a difference. Since index is on the shoulder and seems really picky, I don't crimp. I don't think there is much if anything to gain. Mostly ignore the canneleur anyway if they have one.

 

[Jasarii]

I place a "light" crimp on all my 300BLk loads. Lee Factory crimp die.


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