Originally Posted by
Semisane
mjac, I found load development more finicky with T7 because it had a tendency to blow the patch. It shot OK for me once I found the powder charge/patch/ball/lube combination the gun wanted. But not as well as either Pyrodex or GOEX, both of which were more forgiving. With T7, increasing the amount of lube over what I used for other powders seemed to help.
Semisane...I probably haven't used T7 nearly to the extent that you have, but I noticed blown patches while using it in one of my .50's that I normally don't have any trouble using GOEX FFF and a .015 patch. I thought it was because the patches I was using had been lubed and stored for some time and possibly the lube had dried out some. I rubbed more lube (I believe it was Ox-Yoke 1000 plus) onto the remaining patches and didn't observe any more blowout or "burnt through" patches. That led me to think that if I was gonna sit down for a session with T7 again, that I should lube the patches just prior to shooting or maybe try a thicker patch...BPS