HTC309-153-SP in 16" 300 Blackout

Hello Fellow Shooters,

CheapCastard here

• NOE 2 Cavity 309-153-SP Brass
• Unfortuntly didn’t weigh the projectiles until after powder coating but… came out with two weight ranges: 156.5grains-156.69grains and 156.8grains-156.99grains
• Alloy hardness: (to be updated)
• FC 223 Rem Range Brass converted, fired a few times in my rifle, a few primer pockets felt, ..easier.., to seat, so we’ll see…
• M Die neck expanded and bell the mouth out just enough to start to seat the projectile and not require crimping for a snug fit
• Propellant: H4198
• 110 Cartridges
• Charges ranging from 11.3grains – 17.3grains & 17.9grains: 5 cartridges for each .3 grain increment
• Seated 2.155 (too long for my rifle) the throat sizes down some of the driving band exposed: ~.099″
• Compass Lake, Wilson Arms 300 Blackout 16″ Pistol Length Gas
• AR Platform
• Using cheap amazon rifle scope @ 30x
• Distance to target: ~100yards

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I am going to report my testing here for everyone to see my mistakes and hopefully some success…

Range Report later today or tomorrow…

CheapCastard
Lead for nothing and chicks for free