Loading .310 jacketed bullets in .303 british

[danyboy]

Any bore dammage when using undersized jacketed bullets in a rifle ? Have a lot of .310 surplus fmj bullets I planned on using for my .303 british.]

 

[Sport45]

Should be okay. I've run more than a few through my 7.7mm Arisaka.

Accuracy was terrible though so I saw it as a waste of bullets. .312" 174gr Hornady bullets shoot much, much better and don't cost an arm and a leg.

I saved the 123gr .310 bullets for kids "plinking" ammo in the Garand.

 

[danyboy]

Just sold my 7.62 x 54R. Got whole lot of surplus ammo. Thought of using bullets and powder in my .303 longbranch and that undersized bullets would let gas through and dammage to the bore.

 

[WestKentucky]

Shouldn't damage it, but it will be slightly weaker and much less accurate.

 

[danyboy]

Thanks for your help guys. Appreciate.

 

[winchester1886]

The .310 bullets are rare I have looked for several years and finally gave up.I now shoot.311 in my MN. I have had no problem getting Sierra 303 bullets in 311 dia.

 

[GBExpat]

Just sold my 7.62 x 54R. Got whole lot of surplus ammo. Thought of using bullets and powder in my .303 longbranch and that undersized bullets would let gas through and dammage to the bore.

Here's a thought ... rather than spending a lot of time making inaccurate ammo , how'bout selling that pile of 7.62x54r surplus ammo and using the proceeds to buy some proper bullets for your Enfield reloading?

 

[george d dennis]

check your bore size. I have three enfields, two are the same. the third one is not.

 

[clearcut]

A powder coating could add some to the diameter.
CC

 

[danyboy]

GBExpat,
Inaccurate ? Not so, you'd be surprised. Time consuming ? Much faster than conventional reloading after you find a quick way of pulling bullets out (made myself a tool for it) . Cost ? Next to nothing.

 

[GBExpat]

... Time consuming ? Much faster than conventional reloading after you find a quick way of pulling bullets out (made myself a tool for it) ...

"Much faster than conventional reloading" ... that makes it sound like you are replacing the bullets in .303 cartridges with the 7.62x54r bullets.

 

[Havok7416]

A powder coating could add some to the diameter.
CC

Powder coating, if done properly, shouldn't add to the diameter as the bullet gets sized after the coating is applied.

 

[Sunray]

There's never been any milsurp that uses a .310" bullet, that I've ever seen. Won't hurt anything though.
A Lee-Enfield barrel can measure from .311" to .315" and still be considered ok. Slug your barrel.

 

[Sport45]

I still have a bag of 123gr .310" milsurp bullets. Pulled from 7.62x39.

Good plinking bullets for the M1, but not fat enough for the T99.

 

[351 WINCHESTER]

Sometimes a .310 fb bullet will bump up when shot and be accurate enough. One word of caution though - Sometimes the undersized bullet can be pushed back when chambered and when you pull the trigger the primer will go off and you will end up with a stuck bullet and dump a lot of powder. It happened to me once when I was in a heck of a hurry to get my rifle sighted in. Thank God I stopped, looked down my bore and got a range rod before I resumed shooting.