Re: Neck turning vs reaming?
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Derek01</div><div class="ubbcode-body">I necked down some lapua 243 brass to 22cal. Shot great. Resized and tried to trim but the 22 trimmer collet won't fit in the case. Would it be better to ream inside the neck or measure and turn the outside of the neck? </div></div>
For accuracy you do both. You want a consistent neck thickness to cut any possible problems with irregular brass thickness. When I used to shoot Palma and 1000 yard matches, I did both. I also uniform the primer pockets (even on new brass, you'll find they need it) and also the flash hole. Best primer pocket uniformer on the market currently is the K&M, for flash holes the little Sinclair tool that does it .081 is fast, the K&M that indexes off the case mouth it better, but slower. Since all brass (boxer primed) is punched, you will find burrs in the flash holes even with new brass. Commercial brass I use is strictly Lapua and Norma. I do both on both. I also use a Forster CoAx press because of concentricity issues. On a normal single stage, there are problems. On a progressive press, you won't get tack driving ammo. The USMTU (or AMU or AMTU) uses 20 CoAx presses for all serious distance ammo. They stopped by where I was at Perry to see one of the Pogo sticks I had there (M1A/Devine).
Personally I love the .243. Great little brush gun and I used one for Coyotes in SoCal. But than I'm a .30 shooter (although I do shoot a lot other calibers up to .50).