What cal is the .311 sizer used for?

[cs86]

Title sums it up. Just wondering what most people use the .311 sizer for? It came with a package deal and I wasn't sure if it would be to large for the .308 or 300 blackout.

[bhn22]

Nominal .308 bores. It's the approximate diameter of the average throat (leade) into the rifling.

[btroj]

Cast bullets are generally sized about .002 over bore size. Very few 30 cal rifles will be happy with a .308 bullet.
I size to .311 for most 30s except my 32-20 which gets .313

[BruceB]

I agree.

ALL my .30-caliber rifles (except "fat thirties" like the .303 British) get .311" bullets. That includes about a dozen rifles in total. I don't even bother slugging them. This includes over 5000 cast-bullet rounds fired in my M1A, which thrives on the diet.

I'd say you lucked-out...... just like winning a (small-scale) lottery!

[GabbyM]

I size boolits for my 30-06 to .311 or .312" if the bullet I'm using is large enough as cast. In my 30-30 anything over .310" and the case neck gets to tight. So it gets .310" boolits. In my 243 AI I run a .245" boolit and have need to turn necks to qualify they are not a bit over thick because it only has about .002" release. Which is about minimum.

If your sized bullet will slide into a fired case neck that is free from crimp then it's not to big. As the brass springs back a little after firing.

[cs86]

Thanks. I think I'll keep it for later. I'm hoping to own a 300 blackout and have a .308. Just no molds at this time.

[Jack Stanley]

Every 1903 and 1903A3 I've ever used has worked better with a .311" size .

Jack

[DrCaveman]

I use it for my 30-06 and 30-30, also the 7.62x39 carbine.
If i had any other 30ish calibers i'd probably use it for them too.

Some are probably better with smaller boolits but with my crop of guns 311+ is the winner so far

[wallenba]

For 303 British, and if you're lucky enough to have one... a real tight Mosin Nagant 91/30. I use them to lap out to .313 for my sloppier Mosins.

[Trelan]

Great size for the 7.65 Argentine

[Tatume]

While I have no doubt that 0.311" works quite well, I've had exceptionally good results with a 0.309" sizer die for 30-30, 308, and 30-06.

[375RUGER]

I size .311 for my 308. Tried .310 first, no leading but they didn't fly quite like I wanted. .311 fixed that.

[rintinglen]

I have 5 30-30's. The Winchesters are all fine with .311 boolits, but the Savage has a tight neck and is happier with .310 sizing, so thats what they all get. My 06 gets the .311 boolts.

[jonk]

Great size for the 7.65 Argentine

MMM.... not really, no. The 7.65X53 takes a nominal .313. Most jacketed handloaders use .311 or .312 due to the lack of .313 bullets. For casting I have found one of my guns slugs at .313, the rest anywhere from there up to .3165. Not saying some that are a .310 or tighter, calling for a .311 sizer don't exist of course, just I think it's very unlikely you will find one; I haven't and have at some point owned a dozen of the 1891 and 1909 rifles (currently have 4, kept the best shooters).