I purchased 9mm bullets online expecting what I am used to but these showed up. What do I have here? Thanks, Joe.

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You have a plated HBRN or Hollow Base Round Nose

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Bullets . . .

Thank you both.

Load em up and go. Plated bullet data is usually lower charge weights then jacketed, due to the thin plating. Cast data can be used.

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Regards,

Tom

I bought some like those that were 115 grain Berry's brand. They were advertised as thick plating too and good for 1500 fps. I seem to remember they shot well also.

Looks like a hollow base to me!

This may have been true 20 years ago but for the most part this no longer applies. Plated centerfire Handgun bullets today have a plating thickness that is as thick as a formed jacket. Berry's and Extreme also apply a double plating process to the Hollow Point and Hollow Base bullets and these double plated bullets can withstand 1200 fps velocities. I will also note that the bullets used in Speer ammunition is ALL copper plated, even the Gold Dots. Back around the 2010 time frame the Speer web site had a full explanation of how they make their bullets. Note, all this was pre COVID, what is actually being done right now I have not checked on.

BTW, I have run these Berry's and Extreme .357 bullets to 1620 fps out of my 20 inch 1892 with no loss in accuracy or function. I also routinely build a practice load in 40 S&W that matches the Speer Gold Dots I carry which produces 1150 FPS with a 165 grain bullet. BTW, powder used for this is Longshot which has a burn rate that is freakishly perfect for the 40 S&W.

The only downside (pardon the pun) with the hollow base is they don't feed well at all from my bullet feeder on a progressive press. I bought about 20 100 round bags of Winchester 115 FMJ's with similar design.

Handset the bullets, load and fire away!

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Those look like Berry's hollow base copper plated lead bullets. Copper plated bullets fall somewhere between hard cast and jacketed bullets when it comes to reloading, I'd recommend using hard cast data. The idea of the hollow base is the same as with 38 Special HBWC ammo, the combustion pressure forces the base outward so as to make it better conform to the lands and grooves in the barrel. The end result is improved accuracy.

With these plated bullets come some restrictions on velocity. Exceed the manufacturer's recommended maximum velocity can result in the plating being stripped from the lead, resulting in poor accuracy and lead build up in the barrel.

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If they are 124gr Berrys HBRN-TP Hodgdons has specific load data for that bullet with 20 different powders. I personally use the HB F(lat)N(ose) -TP version for both 9mm & 357 SIG.

Cheers!

P.S. And if it is the 115gr variety you can easily work around their data for a 115gr LRN...

Hollow base and hollow point give a longer bullet that may provide better accuracy due to the increased contact area of the bullet to bore.

Smiles,

Thanks all for the valuable information. Joe

I had not thought of that, but it immediately made perfect sense. Thanks. I'm just getting into reloading and will be using a feeder for my Lee.