With 20-30 shots, one O-ring ought to last me 10 years.
No doubt some think they need to have primers at a certain length and diameter, but this reply I found in an online forum seems to make more sense than worrying about the primer’s length.
If it fits snug under the rim I would think it would be hard to get any blow by - but maybe it does.
I just measured my Winchester W209 primers - .243” did, .3005” length. My last shot was Dec 2019 (we could use any legal rifle during the last 2 Michigan Covid seasons) - and did not shoot prior to that ML season. One shot dropped a nice 10 point at 80 yards.
Posted December 7, 2014
The length of a primer has no significant affect on the fit of a shot shell Primer. The diameter just below the rim, where the primer seats in the case head is the critical dimension. These dimensions are as follows:
.240 = Rem.
.241 = CCI, Fed,
.242 = Nobel Sport, Win, Wolf,
.243 = Cheddite, Fiocchi,
.244 = Rio.
These dimensions are from an article by Tom Ceretto in Trapshooting USA, issue 4, page 50, Nov/Dec 2009
No doubt some think they need to have primers at a certain length and diameter, but this reply I found in an online forum seems to make more sense than worrying about the primer’s length.
If it fits snug under the rim I would think it would be hard to get any blow by - but maybe it does.
I just measured my Winchester W209 primers - .243” did, .3005” length. My last shot was Dec 2019 (we could use any legal rifle during the last 2 Michigan Covid seasons) - and did not shoot prior to that ML season. One shot dropped a nice 10 point at 80 yards.
Posted December 7, 2014
The length of a primer has no significant affect on the fit of a shot shell Primer. The diameter just below the rim, where the primer seats in the case head is the critical dimension. These dimensions are as follows:
.240 = Rem.
.241 = CCI, Fed,
.242 = Nobel Sport, Win, Wolf,
.243 = Cheddite, Fiocchi,
.244 = Rio.
These dimensions are from an article by Tom Ceretto in Trapshooting USA, issue 4, page 50, Nov/Dec 2009