i got a great (or maybe not so great)deal on 500 xtreme .451 230 gr plated flat nose. i use random cases, cci300 primers and 7 gr of power pistol. i set the col at 1.225 aaaaaand they wont chamber. did the barrel drop test and kept shoving the bullet deeper and i finally got the ok at a 1.164 col. will this be ok? im worried that this col will raise the pressure too much, what do you think? BTW its a sig saur xo 1911
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