45ACP

mt10mm · December 12 2015 08:00:22 AM MST

Does anyone have any experience with UW 255gr hardcast?

TSP45ACP · December 12 2015 07:13:57 PM MST

Nope, only my own.

mt10mm · December 12 2015 07:51:18 PM MST

Shot the UW load today from my Glock 30 and they are on the stout side. My guess is they will penetrate very well. They sure will make a large hole in whatever it hits.

Osageid · December 12 2015 08:16:25 PM MST

I have shot their 200 gr JHP - stout is appropriate

The_Shadow · December 12 2015 09:05:49 PM MST

Need to pull one down to see what he is using... ${$default_roll_eyes_smiley}$

mt10mm · December 12 2015 09:22:26 PM MST

Quote from: The_Shadow on December 12 2015 09:05:49 PM MST
Need to pull one down to see what he is using... ${$default_roll_eyes_smiley}$

PM me you shipping info and I will send you one ${$default_smiley_smiley}$

The_Shadow · December 12 2015 09:45:57 PM MST

Quote from: MT10mm on December 12 2015 09:22:26 PM MST
Quote from: The_Shadow on December 12 2015 09:05:49 PM MST
Need to pull one down to see what he is using... ${$default_roll_eyes_smiley}$

PM me you shipping info and I will send you one ${$default_smiley_smiley}$

PM sent... ${$default_cool_smiley}$ ${$default_cheesy_smiley}$

Underwood Technical Information

Caliber: 45 ACP +P
Bullet Weight: 255 Grains
Bullet Style: Hard Cast Flat Nose 21 BHN
Case Type: Brass

Ballistics Information:

Muzzle Velocity: 925 fps
Muzzle Energy: 484 ft. lbs.

gandog56 · December 13 2015 07:22:06 AM MST

I haven't bought any storebought .45 since....well since when I got in my .45 dies I ordered after I bought my first .45. I think over the last twenty years, I bought a grand total of one box.

mt10mm · December 13 2015 11:58:48 AM MST

Quote from: The_Shadow on December 12 2015 09:45:57 PM MST
Quote from: MT10mm on December 12 2015 09:22:26 PM MST
Quote from: The_Shadow on December 12 2015 09:05:49 PM MST
Need to pull one down to see what he is using... ${$default_roll_eyes_smiley}$

PM me you shipping info and I will send you one ${$default_smiley_smiley}$

PM sent... ${$default_cool_smiley}$ ${$default_cheesy_smiley}$

I will get it out to you tomorrow

The_Shadow · December 18 2015 04:53:22 PM MST

MT10mm here is the info documented for the 255 Hard Cast
Cartridge is from Ammo Manufacture: Underwood 255gr +P Hard Cast (21BHN) (supplied by MT10mm)
Ballistics Information: 45 ACP +P
Muzzle Velocity: 925 fps
Muzzle Energy: 484 ft lb
Brass Make/Headstamp: Star Line – Brass +P
Bullet Make/Weight/Construction/Info; Length 0.6690"/Dia. 0.4520": 255 gr. HCFN
Actual weight 245.0 grains (exposed lead base) Crimp line N/A
MEPLAT: 0.2850"
C.O.A.L.: 1.2040"
Primer: Large Pistol Nickel color
Case: Diameter 0.4710" Crimp Diameter 0.4725" Length 0.8930"
Powder Description/Positive ID/Type/Charge Weight: LOVEX D037-01 11.4 grains *
* (very fine irregular ball) (D037-01 same as AA#7 by weight)

mt10mm · December 18 2015 06:04:18 PM MST

Stout load for sure. I think this is the best "woods load" available for the 45acp. I wonder how well it will penetrate?

fltbed · December 19 2015 06:17:12 AM MST

Quote from: The_Shadow on December 18 2015 04:53:22 PM MST
MT10mm here is the info documented for the 255 Hard Cast
Cartridge is from Ammo Manufacture: Underwood 255gr +P Hard Cast (21BHN) (supplied by MT10mm)
Ballistics Information: 45 ACP +P
Muzzle Velocity: 925 fps
Muzzle Energy: 484 ft lb
Brass Make/Headstamp: Star Line – Brass +P
Bullet Make/Weight/Construction/Info; Length 0.6690"/Dia. 0.4520": 255 gr. HCFN
Actual weight 245.0 grains (exposed lead base) Crimp line N/A
MEPLAT: 0.2850"
C.O.A.L.: 1.2040"
Primer: Large Pistol Nickel color
Case: Diameter 0.4710" Crimp Diameter 0.4725" Length 0.8930"
Powder Description/Positive ID/Type/Charge Weight: LOVEX D037-01 11.4 grains *
* (very fine irregular ball) (D037-01 same as AA#7 by weight)

That's close to my 45 acp "heavy" load.
255 gr SWC "Keith" (260 gr actual)
10.0 gr #7 (10.5 gr book max)
Winchester primer
Vel- 940 f.p.s. (5" SA 1911 factory bbl)

Jeff

Captain O · December 23 2015 12:13:58 AM MST

Just when you think the .45 ACP has reached it's limits. "Pushing the envelope" seems to be "the phrase of the day" when it comes to Underwood's loads.

Captain O

fltbed · December 23 2015 01:29:53 PM MST

Quote from: Captain O on December 23 2015 12:13:58 AM MST
Just when you think the .45 ACP has reached it's limits. "Pushing the envelope" seems to be "the phrase of the day" when it comes to Underwood's loads.

Captain O

I got the idea from reading John Taffin articles back in the 90's. Trying to duplicate the old black powder 45 Colt load the ACP was replacing. His pet load was a +P load of 6.0gr-6.5gr of Unique for around 850 f.p.s. I did the same thing testing with newer slower burning powders I thought would be more appropriate without having to go up into the +P pressures.

sqlbullet · December 23 2015 02:13:06 PM MST

The US Military load for the 45 Long Colt was 30 grains of black powder under a 250 grain bullet for 800 fps.

Commercial loads of the time used 35 grains of black powder with the same bullet for 900+ fps.

http://gunsmagazine.com/black-powder-cartridge-ballistics/

The 45 ACP was meant to be between the 45 Schofield and 45 Colt in ballistics, and fits that description nicely.