savagescout
Looking at your 50 yard groups - then your 100 it is hard to believe thay came from the same gun.
The big difference in the GP's and the Bull Shops, as you probably already know, isit that top ring on the GP's is much bigger and usually requires a short starter to start them, well anyway mine most of then do. Maybe you were achieving more of a consistent gas seal with them.
I am sure you can shoot .504's from that barrel especially a dirty barrel with very good accuracy, but I know whem I was shooting with Cdad I really did not like how loose the .504's were in his barrel. His .5045's were better in my mind.
As you probably know I have not shot any conicals in myWhite, just been shooting sabots with all kinds of different bullets and Triple Seven - have yet to find abullet that the gun will notshoot well. I use MMP HPH-12 sabots everything else is to loose.
After cayugad's testing the other day I think his test results show the consistentcy of T7 - so you might try some of that....
At first i wanted to blame it on on maybe a loose scope, but when you posted the 100 yard XTP group - that kinda ruled that out....
Were you shooting off a bench and bags?
You will get it dialed in - I have faith...