215 vs. 215M

19Scout77

Gunny Sergeant
Full Member
Minuteman
Jun 9, 2007
4,012
622
GA
I am looking for actual as opposed to theoretical info.

I have the perfect load for my 7wsm--using 215Ms.

Ran out of 215Ms--must replace with 215s. No time to chrono etc.

ASC this weekend? Need I be concerned?
 
Re: 215 vs. 215M

Eric,
I think you will be ok. I have used the 210M's for load developement, and then ran the regular 210's for my 308 for a long time, due to not being able to find more of the "m"s. I can not tell much if any difference. Most seem to agree on this, but some have said that there are lots of the non "m" primers with wider standard deviations and extreme spreads. This probably amounts to a bunch of nothing as most of our shots are not far enough out to hurt you that much from verticle dispersion.
Good luck!
 
Re: 215 vs. 215M

I get the same numbers and accuracy with 210s and 215s as with 210Ms and 215Ms. I don't even buy the Ms anymore.
 
Re: 215 vs. 215M

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Rob01</div><div class="ubbcode-body">I get the same numbers and accuracy with 210s and 215s as with 210Ms and 215Ms. I don't even buy the Ms anymore. </div></div>
I have noticed the same thing. The 215's act the same as 215M's.
 
Re: 215 vs. 215M

Thanks guys--that is kinda what I thought. Plus, I think I've got a HELLUVA lot more to worry about with the wind!!

Matt- See you on Friday!

Eric
 
Re: 215 vs. 215M

Like stated above, the "M" means that that particular lot has been inspected more than the regular primers. Nothing special was done to them to make them that way. Only a more vigerous inspection after they were finished.