DKSDonnie
Member
I recently found a very good shooting combo in my 7MM WSM. I was using WLRM Primers and following the Nosler book for my load development and had discovered a sub 1/2" group at 100 yds. I sat down and loaded a few shells to now sight the rifle in for deer season. Expecting some very satisfying groups, I was sadly disappointed. I recently ran out of WLRM primers so I used CCI 250 primers. Reading diff blogs I found that some reloaders found very minimal changes in their ballistics and groups and thought, What the Hell, let's see what happens. The load was the low end of Nosler's powder listings so I saw no need to lower any further. I wasn't
worried so much about velocity changes as it shot so well in the rifle. I have included a pic of the group shot that I intended to use with the WLRM Primers and a pic of the groups i shot this past weekend with CCI 250 primers. Unbelievable difference. Nothing was changed other than the primers. All groups were shot with exactly the same form and time between shots. Notice also how I marked each shot and how the same number in each group is basically in the same spot on the target for that group. WIERD! Anyone else ever seen this. I was surprised to say the least at such a diff.