357 Magnum Factory/Commercial Ammo pulldown

[RDub01]

I wasn't taking close-ups back then..  But I wasn't able to tell any difference from that ball powder to any other.. they all looked the same.

Quite a variety of powder types in those samples..  That Lapua round looks like it has Vihtavuori N-110 in it, or something like it.

[Intercooler]

I have to check if I added the Underwood to the sheet. Tonight I ordered Buffalo Bore 180's to play with!

[RMM]

Yesterday I chrono'd 5 rounds of the Underwood 125 gr. GDHP out of a 6" Ruger Security Six.
1640 fps average!  Cases ejected smoothly.

[Intercooler]

That's about what I figured. I will do them out of my GP100 6" when I receive it. Kevin isn't too good on the heavier weights 

[The_Shadow]

Tested in the S&W model 19 6" June 8, 2013
Atomic 158gr Hex Plated JHP 1265 fps / 1275 fps
LAPUA 158gr JSP   1239 fps /1266 fps
Precision 1 Speer 125gr JHP   1270 fps / 1110 fps
Underwood 125gr Montana Gold JHP    1575 fps / 1518
Underwood 158gr Hex Plated JHP   975 ? fps / 1183 fps

[Intercooler]

Well your strength of ammo's jog with mine but not the numbers. I got your 6" numbers with my 4" GP100 

[Intercooler]

   This is a throw-back to Kevin's first .357's. This is the Hex plated 158gr listed in the sheet moving at about 1100 FPS out of a 4" barrel.

[The_Shadow]

Surprised by the non expansion of those bullets! 

[Intercooler]

  tnoutdoors9 didn't get anything with Kevin's Gold Dot either. They just aren't being driven hard enough at that velocity to open as they should. The Atomic Ammo Hex Raggedyman has is in the 1300's and will give a different result for sure!

     The one area Kevin needs a change in is the heavy Magnums.

[The_Shadow]

Cartridge is from Ammo Manufacture: Buffalo Bore 140gr Barnes TAC-XP
Ballistics Information: 357 Magnum
Muzzle Velocity: 1600 fps
Muzzle Energy: 795 ft. lbs
Brass Make/Headstamp: Top Brass – Brass
Bullet Make/Weight/Construction/Info; Length 0.7755""/Dia. 0.3565": Barnes 140gr TAC-XP
Actual weight 140.2 grains  cannelure grove: 0.3415"
HP depth  HP 0.2555" / HP dia. 0.1760" / mouth 0.1790" / Nose segments-6 
C.O.A.L.: 1.5785"
Primer: Nickel color
Case: Diameter 0.3750" Crimp Diameter 0.3630" (heavy roll) Length 1.2845"
Powder Description/Positive ID/Type/Charge Weight: Alliant 2400 16.0 grains
Tested Velocity: 1582, 1598, 1626 Average = 1602 FPS/ 798 LBS

[DM1906]

Cartridge is from Ammo Manufacture: Buffalo Bore 140gr Barnes TAC-XP
Ballistics Information: 357 Magnum
Muzzle Velocity: 1600 fps
Muzzle Energy: 957 ft. lbs
Brass Make/Headstamp: Top Brass – Brass
Bullet Make/Weight/Construction/Info; Length 0.7755""/Dia. 0.3565": Barnes 140gr TAC-XP
Actual weight 140.2 grains  cannelure grove: 0.3415"
HP depth  HP 0.2555" / HP dia. 0.1760" / mouth 0.1790" / Nose segments-6 
C.O.A.L.: 1.5785"
Primer: Nickel color
Case: Diameter 0.3750" Crimp Diameter 0.3630" (heavy roll) Length 1.2845"
Powder Description/Positive ID/Type/Charge Weight: Alliant 2400 16.0 grains
Tested Velocity: 1582, 1598, 1626 Average = 1602 FPS/ 798 LBS

Typo? The initial energy figure is just a bit optimistic. 1600 FPS should be 795 FPE. 957 FPE would require 1755 FPS. Your "tested" figure is correct, though.

[The_Shadow]

Thanks!  Great catch!   I try my best to be very accurate with my posting.  Sorry about that!  My typing fingers must have transposed the numbers...795 is what it is suppose to be.  Correction Update was made!

[The_Shadow]

Cartridge is from Ammo Manufacture: Underwood 125gr Sierra JHP
Ballistics Information: 357 Magnum
Muzzle Velocity: 1550 fps
Muzzle Energy: 666 ft. lbs
Brass Make/Headstamp: Top Brass – Brass
Bullet Make/Weight/Construction/Info; Length 0.5430"/Dia. 0.3570": Sierra  125gr. JHP
HP depth 0.1750" / HP tapered 0.1250" / mouth 0.2210" / 6 nose cuts TC style
Actual weight 125.2 grains  Cannelure groove 0.3465" / crimped medium
C.O.A.L.: 1.5670"
Primer: Brass color
Case: Diameter 0.3760" Crimp Diameter 0.3710" Length 1.2815"
Powder Description/Positive ID/Type/Charge Weight: H-110 or 296  21.0 grains

[The_Shadow]

Cartridge is from Ammo Manufacture: Underwood 158gr Hornady XTP
Ballistics Information: 357 Magnum
Muzzle Velocity: 1450 fps
Muzzle Energy: 737 ft. lbs
Brass Make/Headstamp: Top Brass – Brass
Bullet Make/Weight/Construction/Info; Length 0.6700"/Dia. 0.3570": Hornady 158gr. XTP
HP depth 0.1265" / HP tapered 0.1180" / mouth 0.1940" / 6 nose cuts TC style
Actual weight 158.0 grains  Cannelure groove 0.3465" / crimped medium
C.O.A.L.: 1.5760"
Primer: Brass color
Case: Diameter 0.3760" Crimp Diameter 0.3740" Length 1.2820"
Powder Description/Positive ID/Type/Charge Weight: H-110 or 296  16.0 grains

[Intercooler]

Kevin's 125's have stayed the same just like he told me. Looks like the heavy stuff has though.