Does Coating Burn Off HT Coated Bullets in 45ACP?

[ballman6711]

Does anyone have any reliable information on whether coatings do or don’t burn off in 45ACP loads and which powders do or don’t burn it off?

I shoot Acme 185gr swc in my 1911. I've only recovered one bullet, and the coating did not burn off. It did have exposed lead from rifling, impact with whatever was in the berm, and my crimp (I have to crimp at .468" for good feeding). It also had some scorch marks on the base and side.

Pics of the recovered Acme and a recovered Speer 185gr TMJ swc fired through the same 1911.



chris

 

[doubleh]

Because Alliant and other companies are in the business of ADVERTISING!!

If applied correctly HT doesn't burn off. There was some talk about HT dissolving when exposed to the chemicals in smokless powder over a long time.
Much to do about nothing!

I tried burning some coated bullets with a propane torch. The lead started to melt inside the coating, not the coating.!

I just remelted some coated bullets that I wasn't satisfied with which resulted in a lot of nasty plastic gunk floating on top of the melted lead. I have never found any plastic residue in the barrel of any gun I have shot PC bullets in including 45 ACP. I can't speak to purchased bullets as I have only shot bullets I cast and coated with Eastwood powder. I have never bothered to recover one as I believe the absence of plastic residue in the barrel is proof enough of their durability.

 

[Rule3]

I just remelted some coated bullets that I wasn't satisfied with which resulted in a lot of nasty plastic gunk floating on top of the melted lead. I have never found any plastic residue in the barrel of any gun I have shot PC bullets in including 45 ACP. I can't speak to purchased bullets as I have only shot bullets I cast and coated with Eastwood powder. I have never bothered to recover one as I believe the absence of plastic residue in the barrel is proof enough of their durability.

HT coating is not the same as PC coating.

As to smell. the HT bullets do give off a "burned electrical" type smell.

See Forests post #20/ HT is a polyester type coating

 

[doubleh]

HT coating is not the same as PC coating.

As to smell. the HT bullets do give off a "burned electrical" type smell.

See Forests post #20/ HT is a polyester type coating

Sorry for the difference coating info but aren't both HT and PC coating basically a plastic? Maybe polyester plastic is inferior to whatever plastic PC is?

 

[jmorris]

I can melt all the lead inside the Hi-Tek coating of a bullet, poke a hole in the coating and the lead will pour out. The blob on the right is a naked bullet (both were beside each other during heat application).



That’s more of a long duration of ~ 650F vs an unknown level of heat for a couple micro seconds but I have also recovered fired bullets that have the coating intact on the base as well, the lands can rub it off. My HT coated bullet is the top one, the bottom is a Precision bullet.



My PC bullets handle the ride down the barrel OK but heat both and it’s easy to see they are not the same product.



Another naked bullet heated beside PC. PC coated one melted completely before the naked bullet even started.

 

[CQB45ACP]

I can melt all the lead inside the Hi-Tek coating of a bullet, poke a hole in the coating and the lead will pour out. The blob on the right is a naked bullet (both were beside each other during heat application).

View attachment 1031139

That’s more of a long duration of ~ 650F vs an unknown level of heat for a couple micro seconds but I have also recovered fired bullets that have the coating intact on the base as well, the lands can rub it off. My HT coated bullet is the top one, the bottom is a Precision bullet.

View attachment 1031140

My PC bullets handle the ride down the barrel OK but heat both and it’s easy to see they are not the same product.

View attachment 1031141

Another naked bullet heated beside PC. PC coated one melted completely before the naked bullet even started.

View attachment 1031142

Very interesting thanks