35 whelen reloading problems
I am reloading 35 whelen barnes 200 grn ttxp and i used 56 grns of IMR-4064 shooting this out of a TC Pro-Hunter 24" flutted barrel with muzzle brake. The bullet is separating and punching 2 holes in target at 100 yrds. I had no problem with this bullet using RL-15 at 57 grns but can't find this powder anymore. Has anyone experienced this problem can tell me the cause. Have IMR 4198 ansd RL-19 if anyone has a loading recepite for these powders. Also have IMR-4350 I use in my 7MM.