Thread: 284 Powder and Bullet advice

Tried AR2209 and Re16 with 120 ballistic tips and 120 ttsx's recently. 20" barrel.

120nbt/ar2209/winchester brass/cci250/2.975" (brass simply sized, chamfered, deburred, and loaded)
54.3 2918
54.6 2887
54.9 2917
55.2 2929
55.5 2915
55.8 2983
56.1 3003
56.4 3061
56.7 no reading
57.0 3049, no pressure signs
57.5 3082, 3085, 3096, 3060, 3111 shotgun pattern

120ttsx/ar2209/winchester brass/cci250/3.000" (brass prep same as above)
53.9 2833
54.2 2854
54.5 2895
54.8 2932
55.1 2960
55.4 2951
55.7 2955
56.0 2991
56.3 3022
56.6 3018 no pressure
56.9 3072, 3051, 3046, 3022 great looking group, shame about the ES

120nbt/re16/winchester brass/cci250/3.000" (brass annealed, sized, trimmed, chamfered, deburred, flash holes deburred, the works...)
54.8 no reading
55.1 no reading
55.4 3078
55.7 3109
56.0 3106
56.3 3108
56.6 3133
56.9 3173
57.2 3183
57.5 3216 no pressure signs, exceeded 3100ft/s goal, shots 3-8 clustered in 0.5" group, 5rds loaded at 56.0 to confirm (result tbc)