Primer substitution

Wildalaska · June 26, 2007, 12:23 AM

Well the search for GM210Ms continues...I have 350 approx left and that is enough to last me a a little bit for the match guns

Has anyone gone from 210Ms to another brand "X" without having to adjust their load to much and without any degradation in accuracy?

WildsparkyAlaska

**Unclenick** · June 26, 2007, 09:18 AM

See the thread on the Primer Crisis. Lots of people have gone to the CCI BR, despite the price. Another thread contributor mentioned PMC as getting popular on the BR circuit. I think these must be their drop-in (no flashhole enlagement or crimp required) non-toxic primers. The BR people prefer a weak primer, IIRC. One year they went ga-ga over a particularly wimpy lot of RWS primers. They want the powder charge to do all the pressure determination. I can't imagine that works nearly as well with ball powder as it does with stick powder, unless maybe the case is full nearly to compression. Some people still swear by Remington and Winchester for some loads.

As to substituting without a new load workup, I think you better forget it. Even lot changes within a particular brand can make that necessary if you have a really tight sweet-spot load.

June 26, 2007, 12:23 AM	#1
Wildalaska Junior member Join Date: November 25, 2002 Location: In my own little weird world in Anchorage, Alaska Posts: 14,172	Primer substitution Well the search for GM210Ms continues...I have 350 approx left and that is enough to last me a a little bit for the match guns Has anyone gone from 210Ms to another brand "X" without having to adjust their load to much and without any degradation in accuracy? WildsparkyAlaska

June 26, 2007, 09:18 AM	#2
Unclenick Staff Join Date: March 4, 2005 Location: Ohio Posts: 21,060	See the thread on the Primer Crisis. Lots of people have gone to the CCI BR, despite the price. Another thread contributor mentioned PMC as getting popular on the BR circuit. I think these must be their drop-in (no flashhole enlagement or crimp required) non-toxic primers. The BR people prefer a weak primer, IIRC. One year they went ga-ga over a particularly wimpy lot of RWS primers. They want the powder charge to do all the pressure determination. I can't imagine that works nearly as well with ball powder as it does with stick powder, unless maybe the case is full nearly to compression. Some people still swear by Remington and Winchester for some loads. As to substituting without a new load workup, I think you better forget it. Even lot changes within a particular brand can make that necessary if you have a really tight sweet-spot load. __________________ Gunsite Orange Hat Family Member CMP Certified GSM Master Instructor NRA Certified Rifle Instructor NRA Benefactor Member and Golden Eagle