Chas,
Good break-in proceedure, and yes you need to use copper removal also (I use Shooter's Choice).
If you are looking for good groups "during" the break-in period..............I don't even care about the first 3 shots after cleaning the barrel; still pushing solvent & oil out of your just cleaned barrel.
I do look at the next 2 to 3 shots, once I have some fouling from the previous rounds.
I must admitt; I really don't look for the right ammo or the best groups until I have at least 100 rounds through a new tube.
Lastly, any gun will shoot differently (POI) with a cold clean barrel VS a dirty warm barrel (part of the reason for barrel break-in - reduces the difference of POI between the two).
BTW - That's why a lot of experienced hunters will always shoot 3 "fouling" rounds, and then put their rifle away "dirty" before going hunting the following day.
Just my way of breaking-in my rifles.
Last edited by Sheridan; 09-08-2011 at 10:12 AM.