My new rifle arrived and I got to take it to the range for the first time. I followed the break in procedure recommended by Cooper. The only ammo I had was a box of 140gr Remington factory rounds and some handloads that were left over from another rifle (the load has shot very well in several other 7mm-08's).
The first 6 shots were used to get the rifle sighted in. This is the first bolt action I have not been able to get on the paper by bore sighting and I've done a lot of them. Strange. Not sure if there's something weird going on with the bedding or what?
The first group fired with a clean barrel for each shot (shots 7-9) grouped 2.4" for three shots with the Remington factory load.
The next group fired with the barrel fouled grouped four rounds in 1.54".
The next group fired with the same handload grouped four rounds in 1.46". However, the first shot from a clean bore was out of the group. The next three went into .51".
The final group was again with the Remington factory load and it was 2.4" for five rounds.
The barrel seemed to foul pretty bad at first but improved some as more shots were fired. It still fouls noticeably more than my Hart barreled 300 Win Mag. The test target also seems not as good as others I've seen posted. It does work out to just under 1/2" at 100 yds. if it was fired at approx. 44yds.
I'm curious from other Cooper owners if this is this typical for how other Coopers shot during the break in period?
I have a total of 22 shots through the rifle with no attempt at load development.
I was moving my scope between some of the groups so ignore the point of impact.