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As some may recall, I bought a 7-08 last winter to rechamber to 284win.
I have some info for you about the Marlin 284 I have.
Depending on the powders used, I've seen some wide velocity variations with the 139 Hornady SP, and the 140 Nosler BT. Some powders are only about 2600FPS, others 2750-2800fps, and IMR4350 seems to be leading the pack.
I've seen 139gr SST average 2995fps with so-so accuracy, and 139gr Hornady SP average 2948fps with good but not outstanding accuracy. I'll back the SST charge down about 1.5 grains and the Hornady SP down about 1 grain and see if things tighten up and still stay over 2900fps.
As long as I keep the OAL at 2.80 or less, they fit the mag well and feed without any issues. You get 3 in the mag and one up the pipe. The extraction is also fine. The gun even seems to handle some high pressures well.
I got some cases cleaning now and plan on loading up some more IMR4350 under the SST and Hornady SP and see if I can get the groups alittle smaller. All my 284s seems to be fickle like that. Some loads they shoot into tiny little clusters with so-so velocities, but getting them to shoot at MOA with high velocity takes some experimenting.
Once I get things settled some more, I'll post some pictures of the gun and the targets.
I have some info for you about the Marlin 284 I have.
Depending on the powders used, I've seen some wide velocity variations with the 139 Hornady SP, and the 140 Nosler BT. Some powders are only about 2600FPS, others 2750-2800fps, and IMR4350 seems to be leading the pack.
I've seen 139gr SST average 2995fps with so-so accuracy, and 139gr Hornady SP average 2948fps with good but not outstanding accuracy. I'll back the SST charge down about 1.5 grains and the Hornady SP down about 1 grain and see if things tighten up and still stay over 2900fps.
As long as I keep the OAL at 2.80 or less, they fit the mag well and feed without any issues. You get 3 in the mag and one up the pipe. The extraction is also fine. The gun even seems to handle some high pressures well.
I got some cases cleaning now and plan on loading up some more IMR4350 under the SST and Hornady SP and see if I can get the groups alittle smaller. All my 284s seems to be fickle like that. Some loads they shoot into tiny little clusters with so-so velocities, but getting them to shoot at MOA with high velocity takes some experimenting.
Once I get things settled some more, I'll post some pictures of the gun and the targets.