I have a Ruger #3 rebarreled to a 32 special in an 8mm barrel. The twist is 1 in 18. It shoots the Saeco 180gr # 081 bullet VERY WELL. When I try the same bullet without the checks it is tipped when it hits the 100yd targets. WHY? I posted this question on the ASSRA websight and got some theorys, but nothing deffinate. One fellow thought that by leaving the GC off I was creating a boatail and that was doing it. I theorized that without the GC there was less pressure and that made less velocity? A mute point probably, I have ordered a new Borton-Darr flat base bullet mould. But that hasn't cured my curiosity!