It's a good practice to stay right on the cookie jar, but a tad over is OK. I would be careful with stuff that's tough on equipment, i.e. Orange "G-10" for example. The shop frowns on having to whittle this stuff anymore than they have to.
Best, Capt. Chris
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Capt.Chris Stanaback
RKCC/RKCA Founder
RKS #016
NRA Lifetime Member
CAPTSTANABACK@aol.com
WEBSITE: www.captstanaback.com