I currently own a Bersa Thunder .380, which, even though I think is a good handgun, has a caliber that I think is just too small for serious defensive carry. Therefore, I have thinking about moving up calibers, with this tentative list in mind to consider: .38 Special, 9mm, .40, .357 Magnum, .45.
Part of my considerations have been about stopping power, part of my considerations have been about price (of both the round and the gun), and part of my considerations have been about capacity (how many rounds each gun can hold). As you can probably tell, I am all over the place with my choices.
OK: Here's how I divide this problem for defensive carry, which was what you posted about.
.380, with ball ammo, will penetrate about 15" of Gello. With accurate shot placement, that works. HP's will NOT penetrate enough
Now, here's how I divide the problem: not caliber but BULLET weight.
100-140 grain bullets, in .38, .357, .40, or 45 are marginal for penetration, if HP's are used.
Heavier bullets in the .38/357, starting at about 145 grains to 180 grains, will penetrate to the FBI standard .40 load distance of 17.9" in gello, sometimes.
Now, here comes the fun part. Velocity can play a HUGE part in how bullets preform, and not always in the way you think. And, add to that, when you start chopping inches off your barrel, the .357 you just bought could be a 2"
Plus P, really.
The good news is generally, heavy bullets create resistance, and, loose less velocity in short barrels.
The real world tests of some of Buffalobores ammo is posted below. You can
see both the huge energy, and velocity lost, when going from a 4-6" barrel to a 340-360PD:
Item 19E/20—158gr. Speer Uni-core, (Gold Dot) hollow cavity, bullet @ 1,100fps from a 2.5 inch barrel. It is designed to mushroom, yet hold together and penetrate deeply—roughly 13 to 15 inches in human tissue.
S&W mod. 340PD 1-7/8 inch barrel—1,015 fps (361 ft. lbs.)
S&W mod. 66 2-½-inch barrel—1,097 fps (422 ft. lbs.)
S&W mod. 65 3-inch barrel—1,172 fps (481 ft. lbs.)
S&W Mt. Gun 4-inch barrel—1,232 fps (532 ft. lbs.)
Colt Python 6-inch barrel—1,198 fps (503 ft. lbs.)
WARNING—shooting this ammo out of revolvers weighing less than 16 OZ. produces tremendous felt recoil. We recommend our +P 38 SPL ammo for revolvers that weigh less than 16 OZ., if you are recoil sensitive.
Item 19F/20—140gr. Sierra JHC bullet (jacketed hollow cavity) @ 1,150 fps from a 2.5 inch barreled S&W mod. 66. Designed to mushroom and penetrate deeply—roughly 12 to 14 inches in human tissue.
S&W mod. 340PD 1-7/8 inch barrel—1,088 fps (368 ft. lbs.)
S&W mod. 66 2.5 inch barrel—1,156 fps (415 ft. lbs.)
S&W mod. 65 3 inch barrel—1,246 fps (483 ft. lbs.)
S&W Mt. Gun 4 inch barrel—1,321 fps (542 ft. lbs.)
Colt Python 6 inch barrel—1,286 fps (514 ft. lbs.
Item 19G/20—125gr. Speer Unicore (Gold Dot) bullet @ 1,225 fps from a 2.5 inch S&W mod. 66 barrel. Designed to mushroom violently, yet hold together and penetrate deeply—roughly 12 to 14 inches in human tissue.
S&W mod. 340PD 1-7/8 inch barrel— 1,109 fps (341 ft. lbs.)
S&W mod. 66 2-½-inch barrels—1,225 fps (416 ft. lbs.)
S&W mod. 65 3-inch barrels— 1,322 fps (485 ft. lbs.)
S&W Mt. Gun 4-inch barrel— 1,445 fps (579 ft. lbs.)
Colt Python 6-inch barrel— 1,388 fps (535 ft. lbs.)
http://www.buffalobore.com/ammunition/default.htm#tactical357
A 3" barrel seems to be the best compromise, at least from the data above.
I've also found other tests at Brassfetcher.com where a Glock 26 averaged
1200 fps with 9mm ammo, and the same 125 grain Gold Dots used above. the 26 barrel is 3.48" long, and, the Glocks rifling helps boost velocity.
Now, let's add another layer to this mess:
the same bullet, at different velocities.
From Double Tap ammo, compare the .40 S&W 180 grain Gold Dot results with the 10mm results:
"DoubleTap 9mm+P
115gr. Gold Dot JHP @ 1415fps - 12.00" / .70" 511 ft pds
124gr. Gold Dot JHP @ 1310fps - 13.25" / .70" 473
147gr. Gold Dot JHP @ 1125fps - 14.00" / .66" 413 ft lbs
DoubleTap .40 S&W Penetration / expansion
135gr. Nosler JHP @ 1375fps - 12.10" / .72" 567 ft lbs
155gr Gold Dot JHP @ 1275fps - 13.00" / .76" 560 ft lbs
165gr Gold Dot JHP @ 1200fps - 14.0" / .70" 528
180gr Gold Dot JHP @ 1100fps - 14.75" / .68" 484 ft lbs
200gr XTP @ 1050fps - 17.75" / .59" 490
Now, look at the 10MM, and his 45 Stuff:
DoubleTap 10mm
135gr JHP @ 1600fps - 11.0" / .70" frag nasty 768 ft lbs
155gr Gold Dot JHP @ 1475fps - 13.5" / .88" 749
165gr Gold Dot JHP @ 1400fps - 14.25" / 1.02" 718 ft lbs
165gr Golden Saber JHP @ 1425fps - 14.75" / .82" 744 ft-lbs
G29 the 165gr GSHP went 15.0" / .84" The petals were folded further back on the bullet fired from the G20.
-Mike
180gr Golden Saber JHP @ 1330fps - 16.0" / .85" 707 ft lbs
180gr XTP @ 1350fps – 17.25” / .77” 729 ft lbs
180gr Gold Dot JHP @ 1300fps - 15.25" / .96" 676
Using the G29, the 180gr GDHP: 15.5" /.98"
200gr XTP @ 1250fps - 19.5" / .72"
230gr Equalizer @ 1040fps - 11.0" and 17.0" / .62" and .40" 553 ft lbs
DoubleTap .45ACP
185gr Gold Dot JHP @ 1225fps - 12.75" / .82" 617 ft lbs
200gr Gold Dot JHP @ 1125fps - 14.25" / .88" 562
230gr Gold Dot JHP @ 1010fps - 15.25" / .95" 521 ft lbs
Here, I'll make it easier:
180gr Gold Dot JHP @ 1100fps - 14.75" / .68" 484 ft lbs
10mm
180gr Gold Dot JHP @ 1300fps - 15.25" / .96" 676
So, the same bullet, going 200 fps faster, penetrates only .5" deeper. However, it expands MUCH more, .68 vs .96".
Keep in mind that both these loads are short of the FBI loads 17.9" of penetration, what they wanted, in the .40 S&W. How did they get it?
They slowed the bullet down, sacrifice expansion for penetration. IIRC,
the FBI load is only going 980 fps.
So, how do you pick? First, you have to be able to conceal the gun.
Find something you are looking at, and find the biggest gun you can conceal, and go from there.
Next, 45 ACP REALLY needs a 4" barrel to get consistent bullet performance, and, consistent weapon reliability.
Then, find ammo you can afford to shoot, that out of the barrel length you are considering gives decent performance.
Your Bersa Thunder weighs only about 23 oz. At that weight, the only guns that really provide the same weight, and increase power are the Glock 26/27, at 20 oz. in 9mm and .40, and, the Glock 29/30, in 10MM and 45ACP.
The 3.78" barrel in the 29/30 gives about 4" barrel results in velocity.
CZ's RAmi weighs 25 oz, and, the Bersa MiniThunder weighs 27 oz, and is only $350 New. I almost bought a Bersa Thunder, but, the Glocks are lighter, parts are cheaper, and, with either a block, or the Wolf trigger safety, I'd be happy with either.
If you are considering an XD, try and figure out where you are going to put it. They are bigger, and heavier then the Glocks, with more features, safeties, etc.
Hope this helps.
S J.D.