Need help with once fired brass.

[caseyru67]

Hello, I am a relatively new member, first time poster. I've been a reloader for years but I am now trying precision reloading to shoot my rem. 5r to 1000 yrds. In working up loads I found a load that shoots .5 moa or better consistantly with new Winchester brass. However, reloading the onec fired is giving me around 1 moa. My process is decap, neck size, trim length, clean primer pocket and size flash hole, and ultrasonic cleaning. I am using Forster dies. I thought that the fire formed brass would be a good thing. Do I need to buy a full length sizer? Do i need to learn to bump the shoulders? Neck tension? I did not do this to the new brass and it shoots great. Am I missing something? Any help appreciated.

 

[predatornut]

Re: Need help with once fired brass.

When you shot the brass it expanded and increased its volume. Work up a load for the neck sized brass, you should be able to at least match the accuracy you were getting. If I full length size it is just to bump the shoulder back a couple thousandths, otherwise its overworking the brass and could (has for me) result in the web separating.

 

[josephberry]

Re: Need help with once fired brass.

get a chrony, fine tune your neck tension.

 

[Huckleberry75]

Re: Need help with once fired brass.

Fire formed = new case capacity. Start just a little below your previous loading and work up a little. The sweet spot shouldn't be too far away. This is assuming that you worked up and found the accuracy node and were loading w/in it.

A Chrony will help you know what's going down range and just how fast it's getting there.