M71
07-14-2010, 09:18 PM
Will using a gas check adversely affect proper bullet obturation? I'm currently developing loads to shoot a sized (.458), gas checked, Lyman Super Moly Lubed, 470 gr.(490 gr. after lube & GC) in front of charges of 38-45 gr. of Varget in a 34" Shiloh Sharps. I have not yet range tested these charges but I have 82 rounds loaded and ready to go. In my estimation the velocity will range from 1200 to 1600 fps. so gas checks probably aren't really necessary but I speculated that they may keep the bore a bit cleaner. If these developmental loads can't deliver 1 minute of angle or less at 100 yards I'll probably scrap using GC's. Your thoughts on bullet obturation with GC's will be appreciated.