I am far from an expert on this subject, (very far) but, I think it may prove difficult to obtain great accuracy with the 45 colt. There are several reasons for this. First, the design of the round (a pistol caliber originally) isn’t the best choice for long range accuracy. Second, the majority of bullet choices are lead flat nosed rounds (designed to be shot in lever guns) and again aren’t the best choice for long range applications. Third, the overwhelming majority of rifles chambered for this round are lever actions. As much as I love these guns, they are not the ideal choice for long range shooting. Lever guns can be accurized, but they won’t hold a candle to bolt guns. Check out
www.leverguns.com for improvements that can be made to a lever gun to increase its accuracy. You might be able to produce decent results out to about 200 yards with a lever gun, but beyond that it is hard to comment on accuracy using a pistol calibre. I did read a post on
www.leverguns.com from a guy that shot a 30-30 in a 1000 yard match with decent results, but that is a rifle cartridge.
You have made no indication what type of rifle you will be shooting. If I were to make a suggestion what type of rifle (that’s available) that is best suited for this type of application, I’d have to go with some type of single shot design. Check out
www.ballardrifles.com there are several models offered in 45 colt. However, be warned they are quite spendy.
Hope this helps.
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