RL33 in a 6-284

[95LTZ]

Finally made it to the range yesterday with RL33 & the 6-284. I chambered a dummy round then put a cleaning rod down the barrel to measure the usable barrel length. I added 1/2 " to this measurement for a total of 26.5". I used Rem. 9 1/2 Magnum primers for all loads. 105 Berger Hybrids w/HBN were also used for all loads. The loads other than the RL33 were loads that I had previously worked with. This is my first fast twist (1:7.5) 6-284. This is NOT a test as to how fast I can push the Bergers. I was interested in how fast the very accurate loads were. I used an Oehler 35P chrono 15 feet in front of the muzzle & added 9 fps to arrive at the muzzle velocity. Previously I had started out the RL33 testing with 56.5 grs. & worked up to yesterdays selection.
51.0 grs. RL22 = Avg. 3158 fps
55.2 grs. WMR = Avg. 3369 fps
55.0 grs Retumbo = Avg. 3289 fps
59.5 grs RL33 = Avg. 3249 fps
60.5 grs. RL33 = Avg. 3343 fps
The accuracy was done @ 200 yards. These are only averages of 3 shots. The load of 60.5 grs. RL33 was the most accurate. These charges were safe in my rifle. As always start lower & work up in yours.
Semper Fi

 

[steve123]

Re: RL33 in a 6-284

Is your reamer for a no turn neck and what is the free bore? How about the dies, did you use 6.5-284 with a 6mm sized bushing?

 

[95LTZ]

Re: RL33 in a 6-284

The barrel was chambered several years ago with a borrowed reamer so I don't have the exact specifics. However the throat is long enough for 115 DTAC's. It is a .265 neck so yes the necks have to be turned. I bought a used set of Redding 6-284 neck bushing dies & just adjusted the bushing size.
Semper Fi

 

[steve123]

Re: RL33 in a 6-284

I used to have a 6-284 with a .262 neck. That was a pain turning off that much brass. I was getting 3850 fps with 75vmax. Talk about "red mist"!

I'm thinking about doing a no turn throated for 115's for my Surgeon XL with 300WM mags. Keep me posted on what velocity you end up with for 115's.

Thanks