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I'm getting ready to test several types of 22 ammo in a new (to me) 22. I was wondering if it is best to clean the barrel before testing the next type (i.e.: between each type). I plan to shoot 10 shots through the barrel before measuring the groups for each type. What 's your experience been?
 

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I like to clean the barrel with MPro-7 between brands then dry with a patch or two. Then shoot 10 shots to foul or season the barrel with the new ammo before starting to count new groups.
 

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Ditto... I use mpro7 too, but any solvent will do. I believe to get a true test of the ammo you have to remove the preceding lube and powder fouling so you don't have a mixture and get a false representation of what that ammo will do in your gun.
 
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