Bumping up from .308 to .311 diameter

[Valornor]

If you have a die set for .308 cal and want to make .311 cal bullets. What dies would you order? I'm hoping to get away with a point form die but figured a few of you diemakers my have an insight.

Thanks in Advance.

[sawinredneck]

I'm loading .311 cast in .308/7.62 cases with standard RCBS .308 dies.

[Valornor]

I am sure I can load .308 jacketed bullets in my .303 Brit but they would rattle down the .311 bore and it would be a waste of a bullet. I load cast bullets for my .303 Brit at .312 and they shoot great but I'd like to do some jacketed bullets.

[uncle dino]

311 core seat and point form

[tiger762]

Agreed. One might get away with just the point form but the finished product might be out-of-round. I have a CH4D 312 set that I have used to bump up 110gr 308 (30 Carbine) up to 312 suitable for the AK47. I am relying on the nose of the bullet to center the bullet up in the point form die.

311 core seat and point form

[Valornor]

Ok, that makes sense I was hoping to get by with a point form does but might as well do it right.

Thanks for the input

[yeahbub]

One way I've been able to get very good accuracy with .308s in a .311 is to use bullets intended for .30-30 and load them fairly stoutly. The thin jackets and soft cores will bump up on firing very effectively, but you'll be limited as to point styles.

[Jniedbalski]

I also used 308 diameter for 30/30. Sierra pro hunters .They where the hollow point 125 and 150 grain in my sks. They where accurate out to 200 yards. I knew a older gun smith who told me that they shot good in a sks so I tried it. At first I didint thank they would shoot good but they surprised me.

[Valornor]

I appreciate the insight, I'll have to you around with those loads. I'm more interested in making 174-178gr bullets for my .303 Brit.

[n.h.schmidt]

I have bumped up 147gr nato bullets up to .312 dia in a die I made myself. They will not get a prize for looks. They have a shortened boat tail and the point is now a straight taper. They shot well in a no 3 enfield I have. About as well as the nato bullets shot in some of my 308 guns. About 3" at 100 yds. It bumped up easy on my rock chucker.
n.h.schmidt

[Wolftracker]

You might try powder coating, then push through a .311 Lee sizer. One coat of a high quality powder like Eastwood's will increase your diameter to .312 or more and you should be able to compress it down to .311 with a sizer. You will get zero copper fouling as well. I made some Jacketed rebated boattails, PC'd them and resized them. They came out at .309, probably due to spring back, and shot them from my FN Patrol Rifle, using a minimum load, and they shot fine no problem and no excess pressure signs, other than the crack of the shots seemed sharper. That was .309 in a .308, so .311 in a .311 should be OK. This was just me experimenting as I don't need to bump anything up myself so I haven't done a bunch of it with jacketed bullets. It would be a harmless and much cheaper way to go than buying dies! Maybe I will try one more with a .309 sizer and see if they come out .310 but not shoot it. I don't want to test the pressure gods too far.

[Valornor]

Now that's an interesting idea....