I have a remington 700 vssf in 22-250. Should be my varmint gun but I would rather kill paper at the range. Been using old brass from remington and federal and after I switched to redding match dies my groups went from 2.5 inches to less than an inch at 200 yards. I thought I could improve accuracy even more with some top quality brass. It took me a long time to decide on what brand but I decided on Norma brass. I've only had a limited number of shots with the new brass but its not looking good(im at about 2 inches at 200). So my question is this...what procedure of break in do YOU use to get the most accuracy. So many things are going through my head ie: case capacity has changed, neck thicknes is different, should i anneal new brass, etc. please help

You can size the neck in several increments seperately from the body. This preserves concentricity. For example, if your fired neck measures .256", size it down to .252" and then to .248". Your runout will go from .004" to .001". With Norma brass, neck turning isn't necessary. Load and shoot!

Changing brands is a big variable but don't get too hung up on brass treating. I shot a group Saturday in my 7mm08 that measured .288 with new Remington brass. All I did was run them through the die to straighten the necks that had shipping dings in them.

Good Luck

so try a larger bushing in the die?

Yes.

What die do you have? The Comp. neck die or the "S" die?

s die

I have problems with mine. It induces runout. I now use it as a body die only, and size the necks first in a comp. die.

I first size with a .252" bushing, then a .249" bushing, then size the body. Runout stays below .0015" for 90% of cases, and does not exceed .002" for all cases.

How are u measuring runout? Just got a neco gauge but havent used it much. Anything better? And thanks for all the help!

Sinclair tool, at the neck.

I use Norma brass in two of my rifles ( as well as other brands) and have found it to be thinner and slightly lighter than the rest. Using the same dies the Norma has less neck tension than the rest. There is no noticable (to me) difference in performance between case brands although I only use mixed cases in iron sight shoots. BTW all my rounds are crimped with LEE crimp dies.