www.benchrest.com is where you want to be to look for real record keeping knowledge on cleaning bbl's...if the crusty ole snots will even share it with you.
like most forums, there will be lines drawn but most will tell you squeaky clean should be avoided & not necessary and regular bore cleaning for 'the application' must be consistant for the particular bbl to maintain her peak performance.
I have a pre-64 model 70 that gets scrubbed once a year and takes 10-12 shots to get the gator looking bore filled in and back into moa needs for hunting. I only clean that gun with a brush unless I feel like breaking her back in.
My borden / bryant 6br preferes moly bullets and jb every 50-60 before she opens up.
My new and stupid favorite 5.56 / 12.5 sbr is stuck at 1.25moa regardless what I do...most of the gents on benchrest.com will tell you every bbl is dialed into it's max on it's birth. I hrear of many guys re-crowning / chambering high dollar blanks only to be become hunting rigs because they could not get them to prove .250" @ 100yds.
You can ALSO ruin your bbl by improper cleaning methods and over cleaning has probably ruined more bbl's than it has helped.
Use a good bore guide like the lucas and watch your targets for the particular application.
my one and only screamer group shot with a 6ppc....first 4 shots were as fast as I could run the condition and then the fly showed up, told doc to check the group & whacked him with the same condition. My 5th shot 'back into the group' had a kentucky hold 1" different from where the first 4 went.
The flags changed and it took at least 1/2 dozen shots and more than 5 minutes on the sighters for me to 'trust' the 5th shot would fall back into my 1st 4.
Accuracy is subjective....pick your battle accordingly. Especially with a semi rifle.
I shot CHINGOS of .1" groups with 4 different full blown short range bolt rigs...that is using top notch equipment and wind flags and almost ALWAYS happened on the 5th shot. Don't pick the fly shit out of the pepper on accuracy as it is all subjective to her application.
I did benchrest for fun and relaxation...i cannot imagine going it with a timeline, moving backers and the stress of competition.
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