All of our 300 HAM'R ammunition velocities are listed from an 18" barrel. The velocity rises and falls at an average of approximately 25-35 ft per second per inch.

Which loads should be used for best accuracy for range use target shooting?

All of the following have proven to be very accurate: Speer 125gr TNT, Sierra 125gr SBT, Hornady 125gr FMJ and 135gr Hornady FTX, however the Sierra 125gr SBT in our testing shot well in all barrels and we consider it the best all around load for accuracy.
 

Twist Rate Overview:
1-13:
Shoots all bullet weights from 95gr to 150gr well. It is optimal for 130gr-150gr bullets. Bill’s personal choice is the 1-13 Twist as this is what he shoots the most of.

1-15:
Shoots all bullet weights from 95gr to 150gr well, however at extremely cold temperatures of below zero some 150gr bullets may become unstable. It is optimal for 95gr-130gr bullets.

Which loads are recommended for best terminal performance for hunting?

For big hogs, black bear, mule deer or any tougher game: Speer 130gr HAM'R HOT-COR, Speer 135gr HAM'R Bonded, Hornady 135gr FTX or any of the 150gr loads

For whitetail deer or soft skinned game: Lehigh 110gr CC, Speer 130gr HAM'R HOT-COR or Hornady 135gr FTX

For varmint/predator hunting: Hornady 110gr SP, Speer 110gr SP, Lehigh 110gr CC, Speer 125gr TNT or Sierra 125gr SBT PH
 

What primers do you recommend for reloading 300 HAM'R ammunition?

We recommend CCI450, Federal GM205MAR or CCI41
 

Reloading Data can be found here:

https://www.wilsoncombat.com/300-hamr/

Cutting spent .223 casings - Trim to 1.595"
 

What powders are suitable for reloading the 300 HAM'R?

For maximum velocity and best accuracy Hodgdon CFEBLK is recommended, but good performing loads can be produced with Accurate 1680, IMR 4227, Vihtavuori N120 or Shooters World BLACKOUT.

Which loads are recommended for home/ranch defense?

Hornady 110gr SP, Lehigh 110gr CC, Sierra 125gr SBT PH, Speer 130gr HAM'R HOT-COR or Hornady 135gr FTX

What magazines are recommended for the 300 HAM'R?

Any magazine designed for the 300 BLACKOUT from the following manufacturers: Lancer, D&H, MagPul or Wilson Combat

Ammo Applications:

110gr Lehigh CC #05-308-110-CUSP (our partners at Lehigh Defense designed this bullet specifically for the 300 HAM’R to provide extreme accuracy and deadly terminal performance)

125gr Sierra SPT PHC (extremely accurate, great all around bullet)

125gr Hornady FMJ #30196 (range and target)

130gr HAM’R HOT-COR (proven terminal performance)

135gr HAM’R BONDED (great all around bullet)

135gr Hornady FTX (great all around bullet and possibly the best choice for whitetail deer)

150gr Hornady SST #30303 (for the largest game the cartridge is suitable for)

150gr Speer BTSP #2022 (great all around bullet with a high BC)