I need some help with 311410

[possom813]

I cast a couple hundred of these earlier, the first time I've used the mold, and lo and behold, it's a non-gc mold...


Beyond that, I don't have a manual that lists loads without gas checks.

So, can someone tell me what book I need to find this info? Also, how much pressure would it take to cycle a semi-automatic rifle.


What I've read online(not the gospel) is a starting load of around 7 grains of Unique.

I'm not really looking for a starting load, I need a good load to cycle the bolts.

I have a few different options for powder, including the unobtanium "Trail Boss", only one jug of that though.




Anyways, what manual do I need to be looking for that would be dedicated to cast loading? Just the Lyman book, or are the others as well?


Edit to add, I'm no where near loading these up yet, I don't even have brass for the semi-autos, I just wanted to try out the new mold.

[EMC45]

I know that bullet in my bolt 30-30 with 10gr. Unique leaded. Badly.

[runfiverun]

i'll take a stab at this.
you have a plain base boolit.
you have a semi auto rifle.
they take gas volume to operate.
where are you going to get enough gas volume to operate the rifle and keep your velocity low enough to have any kind of accuracy?
a powder that is way too slow for application might work,but so would black powder for a while.
8 grs of unique would fire the boolit at the right velocity but it won't operate the bolt.
12 grs of 2400 would give a little more gas volume and the same pressure ish
same with goint to sr4756 or to an even slower powder like aa-1680 15 grs of that might give you what you want.
you'll go past the velocit window of your boolit at some point though.
don't be surprised if you end up with a bolt gun with semi-ejection.

[possom813]

I addressed my concerns in the chat room last night.

I won't be using this boolit in anything semi auto, it will be reserved for a a couple of mil-surp .30 caliber rifles that slugged at .310, pretty much going to be a varmint round.


I still need to find a couple of cast-dedicated load books though.

[cbrick]

Possom,

This may help you out, there is a 311410 group buy (now closed) for a MP 2 or 4 cav Cramer HP with pins for a long and short HP or as a FP AND as a PB or GC design available as .311" diameter or .316". The buy is closed but there is usually a few extras if you get your name on the list quickly.

MIHEC Brass 311410 HP (http://castboolits.gunloads.com/showthread.php?167692-MiHec-311410-Brass-Cramer-HP)

I read your post #1 twice. . . What caliber are you requesting info on, I use this boolit in 30 Carbine and 32-20.

Rick

[possom813]

I was going to use it for 7.62x39, but have since re-thought that application. I'm still going to play with it, but in a couple of manual action rifles.

Looking at 6.5grs of Unique in a .30-30 case to plink with after I size them down to .309.

If it leads too terrible, or doesn't do exactly what I expect, then I'll figure something else out to use it for, maybe buy another rifle for the mold :drinks:

[runfiverun]

go head and rethink that .309 size down.

[curator]

You might try Reloder7 or even IMR3031 with the 7.62X39 and #311410. I have had "moderate" success in the M1 carbine using this boolit and WC680 by adding a wax gas check under the slug. I double lubed the slugs by lubesizing to .310 and using LBT blue in the grease-groove, then tumbled-lubed with 45-45-10. CF Ventures wax gas check was added before seating the boolit. Velocity is about 1650fps and it operated the action smartly. No leading appeared even after more than 100 rounds. Accuracy was "adequate" but not exceptional. This may be due to the barrel's 1 in 20" twist which may not properly stabilize a projectile of this length.

[Larry Gibson]

As with most PB'd cast bullets very god accuracy above 1500 - 1600 fps will probably be difficult to achieve. A GC'd bullet will be needed for accuracy in the 7.62x39 at anything above that. I worked with the 311410 in solid and HP versions in numerous cartridges for about 10 years and finally sold the moulds and went to GC'd moulds for loads above 1600 fps, actually if I'm pushing above 1400 fps in a CF rifle I use a GC'd cast bullet.

Larry Gibson