Thread: 284 Powder and Bullet advice

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.

Originally Posted by Tirau

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.

If you want a bit more velocity, try H414 or IMR7828SSC or RE26

Originally Posted by GWH

If you want a bit more velocity, try H414 or IMR7828SSC or RE26

I’ve got some r26 on hand, I’ll take accuracy over speed tho. How much 26 are you guys stuffing in the case to get up around 2750fps? 20in barrel, 3.064 OAL 160tmk if anyone’s got quickload. Norma brass seems soft and pressure signs early.

Originally Posted by Tirau

I’ve got some r26 on hand, I’ll take accuracy over speed tho. How much 26 are you guys stuffing in the case to get up around 2750fps? 20in barrel, 3.064 OAL 160tmk if anyone’s got quickload. Norma brass seems soft and pressure signs early.

56g RL26 gave me 2750 in Petersen brass with 160TMK. 58g gave another 100fps. Neither loads gave good accuracy in my 20" 284Win. RL16 gave better accuracy with 54g @ 2825fps.

Originally Posted by Tirau

I’ve got some r26 on hand, I’ll take accuracy over speed tho. How much 26 are you guys stuffing in the case to get up around 2750fps? 20in barrel, 3.064 OAL 160tmk if anyone’s got quickload. Norma brass seems soft and pressure signs early.

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.

Originally Posted by GWH

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.

Sounds like the issues I’ve had with mine, 51gr of 2209 and ejector marks, sticky bolt at 52.5. Using Winchester bass the pockets were looser than a k road Hooker at 2 firings, Peterson brass may be harder.

Originally Posted by Tirau

Sounds like the issues I’ve had with mine, 51gr of 2209 and ejector marks, sticky bolt at 52.5. Using Winchester bass the pockets were looser than a k road Hooker at 2 firings, Peterson brass may be harder.

How much neck clearance do you have? What is the diameter of the neck in the chamber?

I’ve got 6 thou clearance now, chamber is 318. Neck turned Norma brass to 14 thou so I’ve eliminated a tight neck.