Thread: 1000m rifle.... What?

Originally Posted by Toby

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A 260 rem is a factory case is it not?.

A case with to little taper is harder to eject than a tapered case especially when the brass gets old/fired a few times.

You just can't run them to their full potential because when you do they just won't eject especially if you have little or no primary extraction.

Most military cases have plenty of taper because that makes them more reliable in the field which is a very desirable trait if you are hunting something that can hurt you.

Fire forming is as easy as if you know what you are doing & only has to be done once for each case, just like neck turning, it just isn't as much of a PIA as most people make out.

A true AI chamber will accept a factory chambering happily if head spaced correctly.

Brass for an improved chamber needs to be fire formed carefully otherwise issues can arise which can lead to head separations, which combined with incorrect headspace & hot loads can result in a face full of nasty bits, particularly important to consider with improved chambering's without barrel designations & brass not formed in that particular chamber.