Underwood 220gr Cast WFN 1230 fps Pull-Down

[The_Shadow]

Cartridge is from Ammo Manufacture: Underwood 220gr Cast WFN
Ballistics Information: 10mm Auto
Muzzle Velocity: 1237 fps
Muzzle Energy: 747 ft. lbs
Brass Make/Headstamp: Underwood - Brass
Bullet Make/Weight/Construction/Info; Length 0.7290"/Dia. 0.4010": 220gr Cast WFN
Actual weigh 216.4 grains  Crimp Diameter 0.4010"
Meplat 0.2810"
C.O.A.L.: 1.2660"
Primer: Nickel color
Case: Diameter 0.4215" Crimp Diameter 0.4215" (Light Crimp)Length 0.9880"
Powder Description/Positive ID/Type/Charge Weight: LongShot  8.4 grains

[Intercooler]

LongShot....Hmmm

[mag360]

Thanks for the pull down.  I want underwood to load the 200gr wngc beartooths that doubletap uses to 1275!! Huge meplat.

[The_Shadow]

Any one loading this round may want to read the info at this link http://10mm-firearms.com/factory-10mm-ammo/underwood-220gr-hardcast-(new-load)/
Intercooler had experienced a "SMILE" from this loading.  See results in the linked info.