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Originally Posted by S_Constitutionist
Others online seem to be running this bullet at 1.250" just fine. Is my barrel out of spec?
The gun in question is a 1911 (STI Spartan .45ACP) with 1500-2000 rounds through it. It is all stock.
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Originally Posted by Sport45
I load 200gr SWC to +/-1.250". About a thumbnail's thickness of the driving band is exposed above the case as is pictured above.
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243winxb, nice picture.
Amount of "driving band" or bearing surface exposed above the case depends on the leade length or how soon the start of rifling is in your barrel. Most factory barrels will accommodate around 1/16-1/8" but some factory barrels won't.
My Sig 1911 barrel has very quick start of rifling with almost no leade (space the bullet jumps from case/chamber to the start of rifling) so typical 200 gr SWC bullet OAL of 1.25"-1.26" will hit the rifling. With Missouri 200 gr SWC (Bullseye #1/IDP #1) bullets, OAL must be less than 1.245" or the bullet shoulders will hit the start of rifling when fully chambered.
