Thread: 17" barrel SMLE powder

Quickload predicts you'll get about 2550 fps from the 17" with max loads (for a 303) - which is pretty useful really ( a cobber has shot nearly a hundred deer with a 308 with a 165 at that velocity).

However most of the powders that will give you that speed will be blowing 5-10% out the end of the barrel un-burnt - which usually predicates a magnificent muzzle flash.

If you trade off a little velocity - down to say 2450-2500 and use a powder like Vihtavuori N135, ADI AR 2219 or H322 you'll get nearly 100% burn and lower muzzle pressure = much more pleasant to shoot. These powders usually work well in the 223 as well