factory .313" bullets?

louthepou

louthepou

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Hi everyone,

Is there such a thing as a factory-made .313" bullet? Or will I have to make my own? I'm looking for .313 dia. for reloading .303 Br. Thanks,

Lou
 
When I started reloading and was setting up my reloading room, I picked up a few bullet display boards, just for part of the decor. On the old Speer display I see a bullet example of one, 0.313", 175gr for the 7.65mm. Checking in the latest Speer manual I have, and there isn't anything listed now between 303Br. bullets 0.311" and some for the 32 Winchester Special, 0.321"
 
312 is close enough. The yield strength of a lead core bullet is far less than the 45,000 psi kick in the ass it gets. It gets rammed into the rifling very hard and will fit tight.

The only limit on undersized bullets is if a bullet is too small you can get gas cutting. 1 thou is no problem.

Don't forget the steel barrel is quite elastic and it expands when the round is fired. For the first inch or two the barrel is quite a bit bigger, and the bullet expands with it, and then gets swaged back down by the 4 inch point.

I have watched barrels photographed with high speed x-rays. The barrel looks like a snake swallowing a rabbit for the first few inches.

I am sure there are members here who can calculate the expansion given the pressure and modulus of elasticity. It is a lot more than 1 thou.
 
Ganderite said:
312 is close enough. The yield strength of a lead core bullet is far less than the 45,000 psi kick in the ass it gets. It gets rammed into the rifling very hard and will fit tight.

The only limit on undersized bullets is if a bullet is too small you can get gas cutting. 1 thou is no problem.

Don't forget the steel barrel is quite elastic and it expands when the round is fired. For the first inch or two the barrel is quite a bit bigger, and the bullet expands with it, and then gets swaged back down by the 4 inch point.

I have watched barrels photographed with high speed x-rays. The barrel looks like a snake swallowing a rabbit for the first few inches.

I am sure there are members here who can calculate the expansion given the pressure and modulus of elasticity. It is a lot more than 1 thou.
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Thanks for the info guy. I'd love to get a look at a test or results like that. On my next component 'shopping trip', for my newly acquired Jungle Carbine I plan to pick up some 174gr Hornady. A 303Br. was my first big game rifle when I was a kid in the interior. The 'deal' at that time was, if you were going after Moose, you needed the big stuff, Dominion 215gr. Norma used to make a 215gr bullet for the 303, does anyone these days?
 
Johnn Peterson said:
...Norma used to make a 215gr bullet for the 303, does anyone these days?
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Woodleigh (woodleighbullets.com.au/Bullet List 3.html#Anchor-63421) but they won't be cheap. Corlane's in Dawson Creek is the Cdn. distributor. I bought a box (of 50) 174 gr. from the prev. distributor a few years back and the sticker says $55.00.

Also Hawk Bullets in Salem, NJ. $40.55/box of 50. According to their website they will ship to Canada.

Marstar carries the South African Frontier CMJ 230 gr., but they are sold out.

:) Stuart
 
One day I will get around to making a jig to bump up 308 bullets for 311 barrels. 220 grain hornady round nose bullets would give a quite satisfying kick.
 
company out of Austrailia in a place called Gympy, makes a 215gr bullet called the Taipan in either 312 or 313 but be prepped for 100 bullets 100 dollars.
 
22to45 said:
One day I will get around to making a jig to bump up 308 bullets for 311 barrels. 220 grain hornady round nose bullets would give a quite satisfying kick.
Click to expand...

If you start producing these bumped up bullets (220's), you might be able to sell quite a few on the EE. Lots of us would likely be in for some!
 
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