Sorry my mix up on the twist , 12Bore is 1 in 80in !

I was told that twist & 100yd standing meant fast lighter RB , dont forget when I started this I couldn't find any thing on a 12bore more than 7Dram-13lbs & had no idea even how to assemble a 12 Bore rifle load , heck I started a 25yds just to see where the Hell things were going , as I had no consistency , because I had no consistency in my loading !

My Tolley is in another country right now , so I cant do any more load work till I get back to it .

When I had a load that worked , then I would for sure test at 100yds , when your flying blind you need to cut down on the variables , I had no idea on any thing , powder-wads-shells-ball size- velocity or how to put them together , only from these forums (some books to) & the good folk on here have I come this far .

Having said that I to believe a heavier bullet is what is needed to get things right , that & a test with Black powder may be ?

I have found a couple of photos on the net of rifling similar to my rifle , but mine is sharper on the Lands .