No, the top of the projectile is 1/8th below, fills a lot of airspace up. Probably why only Win cases will fit, a lot thinner walls on the brass than other manufacturers.
Gun is a S&W mod 14 with an Apex barrel 1-8 twist .355. I have had the gun for some 15 years now, built by a friend of mine who has built more than he would like to admit. The cylinder has nice tight chambers (and one not so) which works well.
I normally shoot 24 shot groups and are comparable to what you saw, I couldn't find one to show but have always said to myself that one cylinderful at a time in 4 different positions is the match.
Crimp die is an old RCBS that I have had for 20 plus years now.