44mag
welcome to the forum. hope you enjoy yourself here.
i read two articles about rock island recently and both articles gave rock island 45's excellent marks. they are not target pistols but both were more than serviceable.
the groups i read about were in the serviceable range, 2>4" at 25 yds. most were between 2&3" but the gun didn't like a couple of brands of ammo.
i don't know whether the rock island they were talking about is the same r/a that was an armory during wartime and produced '03s and m-1's or not.
as far as a good load, the 185gr nosler h/p and 4.5 grs of bullseye with a cci primer worked great for me. as usual, start your charge lower and work up. your mileage may vary.
i don't know whether auto ordinance still manufactures 45's or not but they would be a good place to look for a servie pistol also.
good luck.
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