Do i need a Lee factory crimp die for my ar 223?

varmit_master

varmit_master

New member
Will it help or will it hurt my accuracy? Loading 55 gr nosler bt and v max .and sierra 69 gr bthp and hornady 75 gr . And some hornady 55 gr fmj bullets to. I have never used one. The rds will be for my ar 20 inch match barrel 1@8 twist.
 
I never crimped anything smaller than a 375 h&h before, but may experiment w/a Lee factory crimp die soon.

Having reduced the coyote population considerably where I hunt, I find myself loading and unloading my AR a lot more than I used to. Repeatedly slamming bolt home on the same cartridge, I have had two or three bullets push back into the case, one of which pushed back far enough to dump some powder into the action.

If this continues to be a problem, I may try a light crimp and test for affect on accuracy.

Regards,
hm
 
I do the same thing loading and unloading. Sometimes A few miles between stands. I don't wont the powder thing to happen. If I start using one with my coyote loads would I have to resight my gun in. I have my ar driving tacks now. Would it help or hurt my grouping of my gun?
 
It may push your pressure up a very little amount. I'd recommend a slight drop in charge, and work back up to be on the safe side.

Also, most standard dies have a crimp built in...
 
I crimp all my hunting rounds with lee Factory Crimp dies. I think they improve consistency . I have 223 bolt actions , autos , and single shots.
 
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I ordered a batch of LC M193 which came packed in Federal American Eagle boxes and decided to check POI as compared to my handloads (which are loaded above max listed in several books but which show no pressure signs and are extremely accurate.[Capable of
 
I agree wholeheartedly with the exception of heavy recoiling rifles, tubular magazines or if you are apt to re-chamber the same round multiple times in a semi-auto rifle in which the recommended method of loading is to let the bolt slam home.

Regards,
hm
 
Ya know hm, you may be onto something there. I am new to the AR playground and never thought about how the bullet may be affected when the bolt does slam shut. One should check the oal of there rounds in the case of frequent rechambering......
 
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It definately can be an issue. I'm either going to start crimping for the AR (if I find it is not detrimental to accuracy) or will have to change my loading habits and just drop the round in the chamber and use forward assist to make sure the bolt is closed completely.

Before we reduced the number of coyotes on the property I hunt it was never an issue as I didn't rechamber often enough to present a problem.

Regards,
hm
 
As far as accuracy and crimping goes, as long as the bullets are created equal, the accuracy should be consistant. If your gonna crimp, crimp em all. Now, should you use bullets with a cannelure or does it matter?
 
i have been using lee factory crimp dies for about 6 months.i tested with crimp and with out and found that crimp loads.5 shoot groups were better no fliers.with out crimps i would get a flier at times,could have been old hands.
 
Originally Posted By: varmit_masterIf I pick up the crimp and crimp the bullets I have loaded up. Will the ponit of impact change? I just don't want have to reline my gun in.

I cant answere that question because I have never crimped my reloads. Only one way to find out......I would think it may change your poi a tad but by how much??????
 
Originally Posted By: varmit_masterIf I pick up the crimp and crimp the bullets I have loaded up. Will the ponit of impact change? I just don't want have to reline my gun in.

Based on my experiments with about 20 rounds of M193, not too much at 100 yds. The ones I seated the bullet .030-.035" deeper AND crimped shot within 1/2 moa of the factory rounds which came with a lighter crimp, but the only way to answer that question is to shoot them in yourrifle and see.

Regards,
hm
 


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