I have not seen a difference between the 215’s, but have seen the 210 match primers outperform the standard primers and have seen the 205 match primers outperform both the standard and magnum.
I always test the same powder/bullet/case combo with at least 3 primer types. Both my 6.5-284 and 25-06 got their best results with mag primers (WLRM) and Fed 215M came in a close second.
Cheers.
Posts: 684 | Location: N E Victoria, Australia. | Registered: 26 February 2009