TNGrumpy Posted June 13, 2014 Share Posted June 13, 2014 I'm shooting Montana gold 147's. At 25 yards it looks like a shotgun pattern. Was told it may be my crimp die. I have a Dillon one now. Is there a die that is better for the MG? Or give me me an idea how to tighten these up. Thanks Link to comment Share on other sites More sharing options...
xrayfk05 Posted June 13, 2014 Share Posted June 13, 2014 If you are talking 9mm (which seems likely) the only problem the crimp die can cause is too much crimp which is an easy fix. (crimp less ) Anyway, pull some bullets you made and check if there is a ring in the bullet where the case mouth was. If there is, lessen the crimp until it is gone but make sure the round still chambers. Too much crimp can cause inaccuracy allthough you have to crimp a lot for a CMJ/FMJ to exhibit this behavior. Did they ever shoot well or are these your first rounds with this bullet? What powder and how much is behind it? Link to comment Share on other sites More sharing options...
TNGrumpy Posted June 13, 2014 Author Share Posted June 13, 2014 Yes it is 9mm. Shot ok with stock Glock barrel but have a KKM now. Loading 3.8 of titegroup Link to comment Share on other sites More sharing options...
Hi-Power Jack Posted June 13, 2014 Share Posted June 13, 2014 Shot ok with stock Glock barrel These 147 gr MG bullets shot well with your stock barrel? Link to comment Share on other sites More sharing options...
SilverBolt Posted June 13, 2014 Share Posted June 13, 2014 What is your OAL? 3.8gr of TG seems a bit hot to make minor. Have you shot both barrels off a rest back to back at 25 yards? Is you OAL length correct for the new barrel? Link to comment Share on other sites More sharing options...
LoganbillJ Posted June 13, 2014 Share Posted June 13, 2014 +1 for xray Pull a few bullets and check your crimp. Too much crimp will cause a loss in accuracy. You can also not crimp a few and see how they shoot as well. Link to comment Share on other sites More sharing options...
Steve RA Posted June 13, 2014 Share Posted June 13, 2014 (edited) Just remove the bell and no more. Run a straight edge up a factory round and then do the same with your reload, should be the same. Only "crimp" if there is a cannelure and then it's only necessary for a revolver. Edited June 13, 2014 by Steve RA Link to comment Share on other sites More sharing options...
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