Oversized barrels and plated bullets - THR

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Old August 26, 2015, 10:27 AM   #1
Join Date: October 23, 2012
Location: Overland Park Kansas
Posts: 108
Oversized barrels and plated bullets

I've got a Browning High Power 9mm with a barrel that I slugged twice which has a bore size of .358. At this point I've shot nothing but factory ammo through this gun, seems to group alright.

Would like to start shooting some reloads, I don't cast so any lead bullet would have to be commercial and I doubt finding a .359 sized 9mm projectile would be easy let alone fit in the barrel. I've thought about trying some of the coated bullets, but still it would be undersized.

So my question is, how about plated bullets for my high power? Do plated bullets have a better tolerance of barrel size then lead bullets? Or am I just stuck with factory ammo or buying FMJs to reload?

Am wanting on Bar-sto to reapply back on when they will be making new High Power barrels.

sevt_chevelle is offline  
Old August 26, 2015, 01:35 PM   #2
Join Date: May 17, 2003
Location: London, Ont.
Posts: 9,135
.358" is the standard diameter for cast .38/.357. Cast or plated .38/.357 bullets will do nicely.
Sunray is offline  
Old August 26, 2015, 02:10 PM   #3
Join Date: July 12, 2012
Location: West Texas
Posts: 809
If your HP shoots well with factory jacketed bullets, it should do fine with plated.
Kp321 is offline  
Old August 26, 2015, 02:22 PM   #4
Join Date: June 3, 2013
Location: Layton Utah
Posts: 1,527
I hate to disagree with those before me but, having the same issue with my 92FS, I can't agree.

If plated or plain cast bullets don't have a diameter that is at least .001 larger than your barrel, you will never see great accuracy. In my experience there is NO difference in accuracy between plain cast or plated. If they are undersize, they won't be accurate. The plated just lead your barrel less.
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Old August 26, 2015, 03:05 PM   #5
Join Date: May 26, 2008
Location: Maryland
Posts: 111
My Browning High Power's barrel is .357 diameter. For years I tried .356 swagged or cast bullets and ended up with terrible leading. As a consequence, I'm an expert with an Outer's Foul Out III Electrochemical Bore Cleaning System. Accuracy with 9mm jacketed bullets never was all that good either. Reliable and very sturdy the BHP is, but not that accurate. I tried .357 plated bullets and accuracy didn't improve but, after firing them, the barrel was the cleanest I'd ever seen it.
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Old August 27, 2015, 06:39 AM   #6
tightgroup tiger
Join Date: March 20, 2011
Location: Peidmont/Triad, NC
Posts: 1,946

The .359 lead bullets should work better in your barrel if they will chamber.
I would try to get a few free samples and try them before buying any.
tightgroup tiger is offline  
Old August 27, 2015, 08:52 AM   #7
Join Date: September 26, 2009
Location: Colorado
Posts: 183
I don't have the experience to advise on bullet size/type to resolve such an issue but is it possible one of the barrel mfrs like Storm has one for it? That should get you the right bore.

ASCTLC is offline  
Old August 27, 2015, 12:30 PM   #8
Join Date: November 16, 2010
Location: arizona
Posts: 2,076

what is the diameter (measured about a quarter inch below the mouth) of a fired and unsized case? i load and shoot .358" dia. lead bullets in my bhp with no issues. if your chamber is big enough, you shouldn't have any issues doing the same thing.

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