55 FMJ

[clint 45]

Friend give me 100 55gr FMj heads, i reload 50gr,in 223 for general use. Has you use 55gr & alter head on grind wheel, to reduce head point , to match 50 gr s/p. what was result?

[coldweld 65]

Burnt fingers !

[RicW 67]

Have I got this right? You altered your head on a grindstone? And your accuracy suffered? Well f**k my boots.

 

Ric

[clint 45]

Have I got this right? You altered your head on a grindstone? And your accuracy suffered? Well f**k my boots.

 

Ric

 

No !i have 55fmj. I wish to take head profile to similar to 50gr s/p. will be ok ?

[jamie g 17]

Have I got this right? You altered your head on a grindstone? And your accuracy suffered? Well f**k my boots.

 

Ric

 

No !i have 55fmj. I wish to take head profile to similar to 50gr s/p. will be ok ?

 

they spend a fortune on development of bullets and you want to take a ginder to the heads. imo fmj should be used for target only if you want to hunt with some bullets get some soft points or bt ammo.

 

as well has being crap accuracy i bet out your rifle ! i bet they wont do the rifling much good !

Edited May 28, 2010 by jamie g

[JonathanL 4]

Friend give me 100 55gr FMj heads, i reload 50gr,in 223 for general use. Has you use 55gr & alter head on grind wheel, to reduce head point , to match 50 gr s/p. what was result?

 

It will be a waste of time. You will end up losening the core as the jacket is a stress-fit over it and being open at the base already will release all the tension which keeps the bullet together. Even if that doesn't happen then the ballistic properties will be awful with a bullet that shape - even if you can get them all to the same dimensions, which you won't.

 

J.

[clint 45]

This reply from expert for anyone who think of doing this..

 

"Look at the base of one. That's the lead core you see; there's no copper base. Military bullets do not have the core bonded to the jacket, so the core is (or can be) loose in there. File off the point and you have a copper tube with a lead slug floating inside".

 

"What can happen is that the lead core can get forced out, leaving the jacket stuck firmly in the bore. No harm on that shot, but the next one is going to be memorable, to say the least." Your bud state side *******

 

Thank you to all. Clint

[JonathanL 4]

This reply from expert for anyone who think of doing this..

 

"Look at the base of one. That's the lead core you see; there's no copper base. Military bullets do not have the core bonded to the jacket, so the core is (or can be) loose in there. File off the point and you have a copper tube with a lead slug floating inside".

 

"What can happen is that the lead core can get forced out, leaving the jacket stuck firmly in the bore. No harm on that shot, but the next one is going to be memorable, to say the least." Your bud state side *******

 

Thank you to all. Clint

 

The core shouldn't be lose to start with but it can happen from time to time. When the bullet is made the lead core is pressed into the jacket inside a die, the core stretches the jacket to the shape of the die and the elasticity of the copper grips the core holding it in place inside the jacket. It's pretty much sure to be lose after you've filed the tip off though as you are removing all if the tension in the jacket.

 

You may well get the jacket stuck in the bore but I think it's not that likely given how much pressure is generated by a .223 round. Jackets left in the bore is more likely when you use a very light charge under a soft-point or hollow-point bullet. The core is far heavier than the jacket so if the bullet starts slowing down in the bore then the core may pull its way out of the jacket, leaving the latter in the bore.

 

J.

Edited May 29, 2010 by JonathanL

[clint 45]

Not worth risk, i pull all FMJ, i change profile of head of.