Need some 308win loads using lyman 311410

[brstevns]

Just received a 311410 mould and was wondering how it would work out of a 308 win. Rifle is a Parker Hale 308 win bolt action.

[Dthunter]

The only way to know is to try it.
Generally speaking, shorter boolets have a harder time to print tight groups due to the long distance between the major boolet diameter and the start of the barrels rifling in the throat. This distance is traveled by the boolet during the firing sequence. in this "jump", the boolet typically will tip one way or another due to expanding gasses rushing past the boolet before it seals the gasses in the rifling.
When these gases rush past the boolet the lube can be washed out of one side of the boolet grooves.
As a concequence, as the boolet engraves into the rifling, the missing lube cannot aid in sealing,lubrication & supporting the boolet alignment in the bore.

If a cast boolet doesnt get a very straight start into the rifling, it will affect the quality of the boolet to bore fit relationship. This causes a variable result as the boolet leaves the muzzle. This effect causes a lack of consistancy/accuracy.
if the boolet gets severely misaligned before it engraves into the rifling, the boolet can be somewhat damaged. Resulting in a much more severe flier.

Bear in mind that powder/boolet style/primer/seating depth also play a big part in the accuracy equation.
Fast powders (if too much is used)can hammer a boolet very hard and cause a more severe accleration characteristic. This could cause the boolet to tip off bore axis more, or mishape the boolet base before its supported by the internal bore surface. Cast Boolet rifle shooting is all about finding the best balance of components to achieve the best performance.

Even rifling twist rate has an effect on the boolets ability to handle the pressures and misalignment.

Some times a rifle will shoot a boolet very well even if it has a big jump frm the case mouth to the rifling throat. Thats the excepton more than the rule. Again, the only way to really know, is to try it.
If it doesnt work, then explore your options to narrow down the variables.

You should try the 311299, or 311644 designs. They shoot as well as allot of jacketed bullets do in my rifles.

Be sure to have realistic goals to start, then try to improve the results if your not satisfied with them.

Good luck and have fun! Thats what it is all about.

Merry Christmas to "ALL!"

[brstevns]

Lots of information to take in.

[Ben]

I've tried 2 different bullet molds for the 311410.
I shot the bullets in very accurate 30-06 and .308 Win. rifles.

One of the molds had a slight bevel base, the other one a flat base.

Neither shot very well, I sold both of them and don't regret it.

Ben

[HARRYMPOPE]

I agree with Ben and i have had thee of four cross my path.The best shooting one I had was a HP that with 7g of Bullseye would shoot 2-3" at 100 yards for 10 shot groups in a Springfield 30-06 2 groove.The Lyman 3118 32-20 bullet always shot much better for a light 30 bullet.Or try a plain based 311413 that Ben also has done some work with.I shot it in a Ruger 77 308V with 11g f H4227 and it grouped under 1.5" at 100 yards most of the time.

[Ben]

Yes George,

Here is the link to the Plain base 311413 mold and test targets.
311413 molds aren't too hard to locate.
Erik or Buckshot can plain base the mold .

http://castboolits.gunloads.com/showthread.php?169235-U-311413-Plain-Base

This is what my 311413 looked like when I finished removing the g/c shank.
I was well pleased with the way the bullet shot.

http://img.photobucket.com/albums/v494/haysb/014-13.jpg

[brstevns]

How about adding a PB Gas Check?

[Dthunter]

I imagine it would Help in the seal for expanding
Gasses. But to be honest, I have only gaschecked boolets that have a gascheck shank style.

[A pause for the COZ]

Generally I have found 2400 to be an excellent powder for my cast loads in all my 30 cal rifles that have a small to med case capacity.
3006 sized cases not so much.
But I have just started to play with RL-7 in these same cases. Trying to keep the accuracy but kick up the velocity just a bit.
I havent got to the 308 yet but I have tried it in my 30-30 and it performed very nicely. Better accuracy and more velocity.
I sort of got side tracked with my 300 black out. RL-7 is kicking but with that load too.
I will get to trying it in the 308 soon. Pretty sure it will perform well.

Originally what I was after was to find 2400 like performance for the bigger cases. I.E. 8mm Mauser, 7.62x54 and my 303 Brit. 2400 has underwhelmed me in those.

[jed]

For 3006 and the 31141, the best powder I've found is IMR 4759. Burns clean, good load density and the accuracy range loading 18 to 25 grains makes it a very versatile powder. I shot an eight pointer this year and have no complaints about performance

[longbow]

Not a 311410 or .308... but I have been getting pretty decent results with the NOE 0.314" x 129 gr. in my .303.

I am also waiting on the Mihec Cramer 311410 PB.

The NOE is a gas check boolit and I use home made aluminum checks which seem to work fine.

I have not shot it a lot but tried with IMR4227 and got mediocre results so went to a faster powder using by using up some old 700X and got some pretty decent accuracy. I looked at various loads for similar rounds then settled on 10 grs. of 700X. It was a bit more energetic than I anticipated but shot pretty well. I am thinking 8 grs. might have been a better choice for accuracy but the 10 grs. is not bad anyway. I still have some to shoot then will load down some.

So, while not a 311410 and not a .308, pretty similar cartridge volume and boolit weight. So, I would suggest trying a relatively fast powder in light charge to start with. I will be trying Green Dot next as I use it in shotgun and may also try "The Load" info and use Red Dot to see how that goes.

I am looking forward to getting the 311410 HP and if necessary will use PB gas checks. I hope I am happier with it than Ben was with his (but I also suspect my standards are a bit lower).

Longbow

[chickenstripe]

Based upon my records. The 31141 out of a 308 ruger compact rifle, the best accuracy was obtained with 31.0 grains of IMR3031. Obtaining 1800fps, and 5/8" groups at 100yds.

Tried 28.5 - 35.5 grain loads, by 0.5gr incriments.

35.0 grains gave me 2000fps and 1-3/8 groups. Which ended up being my hunting load.

Unsized (~0.310) with finger installed GC, with alox as lube.