Thread: lengths of barrels

.22 rf ammo Manufactures havnt altered their product because the old style is still making them profit.

+1 what gimp said, when I looked into itt a while ago now thats what I ended up finding out.

Originally Posted by Toby

Ahhh so much to learn, I love it. So a shorter barrel makes the projectile drop faster. Is that all? If thats the case and velocitys seem to be the same how long can you go before velcocitys drop and start effecting accuracy.

Shorter barrel will only cause faster drop if it is so short that all the powder does not have a chance to burn = less velocity like Gimp said.

If you get full burn, then longer barrel only adds friction, and will also start slowing the projectile. If you have an infinitely long barrel, eventually friction will win

Then twist rate comes into it by stabilizing the projectile inflight. See RIFLE BARREL TWIST RATES for some interesting reading.

So what is the length for all the powder to burn?

About ten inches probably. Long barrels are retarded.

Originally Posted by gimp

About ten inches probably. Long barrels are retarded.

Scott Trail at Ssrnz.co.nz is using a 308 with a 10 inch barrel and it's hell accurate. My 7mm saum with the 16 inch (140g @3000fps) is the same.

A .22rf 10/22 would have interesting ballistics

tobes, you keep asking "piece of string"questions...

depends on how much powder you use and also type of powder. So for instance if you have a short barrel and want more velocity, you use a faster burning powder. The variations are almost endless, which is why reloading is so addictive...

More of a hand loading thing, so not really relevant to rimfire, unless you find that different manufacturers use different powder or amounts of powder.

Originally Posted by 7mmsaum

Scott Trail at Ssrnz.co.nz is using a 308 with a 10 inch barrel

bet it's a loud little sucker

Originally Posted by ebf

bet it's a loud little sucker

Yes

General .22lr ammo. 1250fps 40gr bullets ok. Im starting to wonder why the barrels are so long if you dont need it. Wouldnt it just be makin it worse

Because balance, tradition, people are stupid, legal requirements in some places (USA has to be over 16"), etc, etc.



The real world difference in terms of speed is nothing either way

Originally Posted by 7mmsaum

Yes

I have a 16 inch and without the supresser it's is unshootable

Wear hearing protection

Can you use a grinder with cutting disc to cut a barrle or a hack saw? I just learnt my mates got a lathe so I can clean the end up on that. Probably be a while before I do anything so I still have time to research it up a bit better make sure I have good idea of what im doing.

Christ pay someone the $40 to do it