When Crimping is done right it will improve accuracy, as I said in the Mini forum , I recived 1000 rounds of BVAC reloads (good company) the rounds I shot where initially at a 5-6 inch grouping, after I crimped the remainder, the grouping went to 2-1 1/2 inch groups. I use a Lee Factory Crimp die on all of my rounds, rifle and pistol, with my 308 at 300 yrds you can palce a nickle over the 3 shot group and you won't see the entry holes. Too much crimp is not good and to little why bother, it takes alittle practice to get it right.

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