Originally Posted by Jinx-)
This one capable of 0.3" when clean, but after 10 - 15 rounds groups open up.
I have found this to be more likely than the case where the rifle gets better after lots of shots.
Most barrels shoot best clean and some shoot best after a fouling shot, but the accuracy falls
off after 5 to 12 shots.
It has a lot to do with the barrel like Broz said, and is easy to find out buy starting with a very
clean barrel and shooting at the same point of impact and keeping tract of each shot, allowing
the barrel to cool 4 or 5 minutes between shots until accuracy falls off.
A lot or the rifles have a problem shooting a 5 shot group but will put 3 in the same hole.
(Have you ever had a fantastic group going only to mess it up on the fifth shot? that is normally
the problem or the barrel heats up.
After break in i test all of my rifles to find out if they like a fouling shot or will put the cold bore
(clean) shot in the same spot. Then I keep shooting until accuracy falls off so I know how many
between shots cleaning are possible.
Once the barrel is fouled and accuracy has fallen off it will reach some point where accuracy
doesn't get worse and if this accuracy level is exceptable then there is hardly any limit on
the number of shots that can be fired.
I have a 308 match rifle that will shoot under 1/4 MOA for the first 6 or 7 rounds then it settles
in at around 1/2 MOA for the remainder of a 100 shot match without cleaning. so I would shoot
the first 60 rounds and clean before moving to 600 and 1000 yard slow fire. And would clean
between these relays.
J E CUSTOM