Clean vs Fouled Barrel POI

[Old Jim]

When firing GG bullets from my Shiloh 45/70, the 1st shot is always 5-6" high-left from a clean barrel. I tried running an SPG-lubed patch thru after wipin any oil from the barrel; still high left. Normally, 4-5 shots from a clean, dry barrel is what it takes to settle things down to a round group. Most testing is done from the bench. It doesn't seem to matter if Goex or Swiss powder is used in the loads. And changing primers didn't help. So ..... I do what needs to be done when shooting targets. Hunting loads in this rifle calls for a sight-setting to take the first shots into consideration.

Jim