Underwood 165gr Speer Gold Dot (1/14/2015) Pull-Down

The_Shadow · January 14 2015 07:37:55 PM MST

Cartridge is from Ammo Manufacture: Underwood 165gr Speer Gold Dot (1/14/2015) provided by Intercooler
Ballistics Information: 10mm Auto
Muzzle Velocity: 1400 fps
Muzzle Energy: 718 ft. lbs
Brass Make/Headstamp: Underwood - Brass
Bullet Make/Weight/Construction/Info; Length 0.5770"/Dia. 0.4000": Speer 165gr. GD
Actual weigh 165.4 grains Crimp Diameter 0.3945" (Concaved base)
HP depth 0.1800" / HP cavity 0.2150" tapered / Mouth 0.2850"
C.O.A.L.: 1.2500"
Primer: Nickle color
Case: Diameter 0.4220" Crimp Diameter 0.4220" Length 0.9860"
Powder Description/Positive ID/Type/Charge Weight: LongShot 10.8 grains

Intercooler · January 15 2015 04:01:30 AM MST

This makes sense.

10.8gr's in this GD gave 1487 FPS
10.2gr's in the TMJ gave 1413 FPS

These are real zingers!

Intercooler · January 15 2015 05:09:26 AM MST

How does that fit the loading books for Long Shot?

sqlbullet · January 15 2015 07:18:33 AM MST

It doesn't. Hodgdon doesn't publish current data for Longshot in bullets less than 180 grains. I am at work and don't have my speer book here, but handloads doesn't have a longshot listing for 165 either.

The_Shadow · January 15 2015 07:31:35 AM MST

When it come to loading data sqlbullet is correct about the info not being in the published data. When it comes to Underwood's loadings, you will not find a matching book load either. Why is that? His loads are above the published data and that is how you see the numbers you are getting.

Just like the new loading with the LOVEX D037-01, it was also above any data by 1.5 grains over highest A#7 book loading.

Underwood stated in an e-mail that his loads were within SAAMI pressures... ${$default_huh_smiley}$

wadcutter · January 15 2015 11:30:22 AM MST

I find it hard to believe these are loaded under saami max pressure. Just because the gun doesn't blow up doesn't mean it's under 37,500 psi.

sqlbullet · January 15 2015 12:57:16 PM MST

Wade,

Do you how Underwood determines that they are within SAAMI pressures?

The_Shadow · January 15 2015 01:04:23 PM MST

In an e-mail I sent to them the stated that all of their ammo is inside SAAMI specs...I did post that somewhere.

sqlbullet · January 15 2015 01:12:10 PM MST

Yeah, I just didn't know if he said how he determines that. It would be nice if he, and all mfg's really, would publish details testing methodology and the raw data from the results.

cwall64 · January 15 2015 03:44:20 PM MST

I talked to Kevin today and asked about SAAMI specs, and he reassured me that his loads are within them. I wish I had seen this thread prior to our conversation and I would have asked!!!