Load testing with new brass

[BML]

Had to scrap all my old brass but I'm still developing my load. I'm prepping 40 new pieces of Norma brass as we speak and got to thinking. I just assumed I would have to fire form every piece before I could resume testing. Am I right or can I test with new unfired brass?

[RockyMtnMT]

If you are not shooting some sort of a wildcat and you full length size you should be fine.

Steve

[BML]

Shooting a savage 6.5x284. I didn't FL size this new brass but I did neck size. I usually wait until I get a stiff bolt before I FL size.

[RockyMtnMT]

I always full length size from brand new and there after. That way nothing can go wrong. I still think you will be fine. I think it would be a good idea to full length brand new that way you will not have any chambering problems. Then go back to your neck sizing practice after that.

Steve

[rscott5028]

I always like to know what my loads will do with new brass as compared to fired brass. If you've found an accuracy node, then the MV may be off a hair, but your accuracy shouldn't completely deteriorate.

NK vs FL sizing will also affect the comparison for a given load.

My main focus is normally concentrated on fired bass that's fully prepped regardless of whether I'm NK or FL sizing for that cartridge. I see no reason to waste barrel life fireforming just for the sake of it. ...might as well practice and collect useful data.

-- richard

[MNbogboy]

I agree with Richard that if you have found something promising that you probably should work from there....Obviously with any component change, ( being a new lot of brass, new lot of powder or even bullet or primer changes), caution should be taken with the new load...If your new brass is of different manufacture than your old brass you may see quite a bit of difference in velocities and pressure signs...

As far as FL vs NK this will be a forever ongoing debate....I have found that FL often creates the best consistency but when I neck size I check every case in the chamber after sizing and bump accordingly to prevent any stiff closings....

Randy

[BML]

Thanks for the tips fellas. I appreciate it.