I’ve finally got my 284 shooting, 50.8gn 2209 160tmk, Norma brass neck turned as had some pressure issues. Only doing 2660fps out of a 20in, but shoots 1/4moa. The tmks do the damage 100m out to 680m so far. R17 wasn’t as accurate.
I’ve finally got my 284 shooting, 50.8gn 2209 160tmk, Norma brass neck turned as had some pressure issues. Only doing 2660fps out of a 20in, but shoots 1/4moa. The tmks do the damage 100m out to 680m so far. R17 wasn’t as accurate.
The range of what we think and do is limited by what we fail to notice. And because we fail to notice that we fail to notice, there is little we can do to change; until we notice how failing to notice shapes our thoughts and deeds
Ive just run the 160 TMK at 3.064" COAL with a 20" barrel thru QL. At 56gr of RE26 pressure is right down at 49804 psi (max is 63817 psi for 284 win). This gives 2,723 fps and the case is only 96.9% full.
At 59gr its 2% overfull (so in theroy slightly compressed, which shouldnt cause a problem) the pressure is 60,302, so under the max of 63k and velocity is estimated at 2,888 fps.
I have been running 56gr behind a 180gr eldm in my 284 win but at a longer COAL of 3.257"
Numbers from QL are obviously only theoreticle eh, some rifles depending on the chamber or even action may not be able to run the loads that QL says are ok. Im going thru this currently with a mates 7mm SAUM - It cannot run powder charges anywhere near what i can in mine.
Start low and work up. The 56gr re26 and 160 TMK load does appear to be very light thou.
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)
Resident 6.5 Grendel aficionado.
Good information thanks Pommy. Similar to my results with the 139s. RE16 has velocity advantage for the same Load in grs as 2209 but not significant. I have some 120bts for my 7mm08 and might give them a go in the 284 at about 57grs RE16 to see how they shoot. Thanks for sharing. I also have some 140bts that I’m going to try instead of the Hornadys with a better BC (0.48 vs 0.39) at 56grs RE16 and should be about 3050fps in my rifle.
I think the velocity gap between Re16 and 2209 grows bigger with lighter bullets. I didn't see much difference with 160's but with 120's it was apparent.
Resident 6.5 Grendel aficionado.
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