Quote:
Originally Posted by RobzGuns
I put at least 250 FMJ through mine before even experimenting with various brands of Carry rounds. That's pretty much SOP for any of my new pistols.
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Agree. A Shield (or other M&P) should need minimal break-in, but I need to be comfortable that it's running properly and will run properly with defensive ammunition. 200 rounds of your chosen defensive ammunition has been the rule of thumb.