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What to do with a spare 300 Winchester Magnum in your collection? Convert it to 350 Remington Magnum of course! :biggrin: :biggrin: :biggrin:
My Remington 798 300 Winchester Magnum is well suited for conversion to 350 Remington Magnum. It has the bolt face dimensions for the 350 Remington Magnum and the long action magazine will allow the short standard overall cartridge length of 2.800" to be increased significantly for loading heavy bullets.
Some issues have been expressed about the 350 Remington Magnum, originally chambered in the Model 600 short action carbine:
- the short action magazine length required 250gr and heavier bullets to be seated quite deep, taking up case capacity in order for the rounds to fit into the magazine,
- the original standard 1-in-16" twist barrel can't properly stabilize bullets bullets heavier than 250gr,
- and the 18-1/2" barrel length limits the full velocity potential of this round.
I have addressed these issues with my 798 long action build.
roud: :top:
The 798 is actually a Zastava Z98 barreled action with a laminate stock installed by Remington and was marketed as their Model 798. Discontinued in 2007, it was available in several common calibers (I also have a 798 in 458 Win. Mag.). This rifle features a Mauser-type action with true controlled round feed, free-floating barrel and a decent adjustable trigger. I specified a 24" barrel with a 1-in-12" twist for my 350 Remington Magnum conversion.
I've seen good results with the Woodleigh 310gr bullet on moose at 2000 fps muzzle velocity in my 358 Winchester BLR (which also has a 1-in-12" twist barrel for properly stabilizing this bullet), so I plan to use this bullet in my 350 Remington Magnum for hunting as well. The original 350 Remington Magnum Model 600 rifles have a 1-in-16" twist which isn't fast enough to properly stabilize 310 gr bullets. I have loaded this bullet in my 700 CDL 35 Whelen which has this twist rate and I don't get great accuracy.
My converted 798 rifle now has a McGowan Precision barrel as specified, free-floating as before, and the action bedding was re-done. I can seat 310gr bullets at the cannelure and the rounds cycle just fine from the magazine.
I'm thinking muzzle velocities around 2400 fps are safely achievable using Re15. Load development to begin. I will report back soon on accuracy and speed results.
Remington 798 .350 Remington Magnum with Leupold VX-2 Ultralight 3-9x33mm scope
350 Remington Magnum cartridge with Woodleigh 310 gr bullet
Model 600 350 Remington Magnum rifle advertisement, circa 1965
My Remington 798 300 Winchester Magnum is well suited for conversion to 350 Remington Magnum. It has the bolt face dimensions for the 350 Remington Magnum and the long action magazine will allow the short standard overall cartridge length of 2.800" to be increased significantly for loading heavy bullets.
Some issues have been expressed about the 350 Remington Magnum, originally chambered in the Model 600 short action carbine:
- the short action magazine length required 250gr and heavier bullets to be seated quite deep, taking up case capacity in order for the rounds to fit into the magazine,
- the original standard 1-in-16" twist barrel can't properly stabilize bullets bullets heavier than 250gr,
- and the 18-1/2" barrel length limits the full velocity potential of this round.
I have addressed these issues with my 798 long action build.
The 798 is actually a Zastava Z98 barreled action with a laminate stock installed by Remington and was marketed as their Model 798. Discontinued in 2007, it was available in several common calibers (I also have a 798 in 458 Win. Mag.). This rifle features a Mauser-type action with true controlled round feed, free-floating barrel and a decent adjustable trigger. I specified a 24" barrel with a 1-in-12" twist for my 350 Remington Magnum conversion.
I've seen good results with the Woodleigh 310gr bullet on moose at 2000 fps muzzle velocity in my 358 Winchester BLR (which also has a 1-in-12" twist barrel for properly stabilizing this bullet), so I plan to use this bullet in my 350 Remington Magnum for hunting as well. The original 350 Remington Magnum Model 600 rifles have a 1-in-16" twist which isn't fast enough to properly stabilize 310 gr bullets. I have loaded this bullet in my 700 CDL 35 Whelen which has this twist rate and I don't get great accuracy.
My converted 798 rifle now has a McGowan Precision barrel as specified, free-floating as before, and the action bedding was re-done. I can seat 310gr bullets at the cannelure and the rounds cycle just fine from the magazine.
I'm thinking muzzle velocities around 2400 fps are safely achievable using Re15. Load development to begin. I will report back soon on accuracy and speed results.

Remington 798 .350 Remington Magnum with Leupold VX-2 Ultralight 3-9x33mm scope


350 Remington Magnum cartridge with Woodleigh 310 gr bullet

Model 600 350 Remington Magnum rifle advertisement, circa 1965

