Rechambering Question
- Thread starter Orv1s
- Start date
.30-06 has a bore and groove diameter of .300 and .308. .35Whelen has a bore and groove of .350 and .358. You cannot rechamber a .30 caliber barrel to a .35 caliber cartridge.
You could rebarrel the rifle - have a new .35 caliber barrel installed. It might be possible to have a .30 caliber barrel rebored to .35. The bore would be reamed up to .350 and new rifling grooves cut.
A rebarrel would cost several hundred dollars.
Easier to just buy a .35Whelen rifle.
You could rebarrel the rifle - have a new .35 caliber barrel installed. It might be possible to have a .30 caliber barrel rebored to .35. The bore would be reamed up to .350 and new rifling grooves cut.
A rebarrel would cost several hundred dollars.
Easier to just buy a .35Whelen rifle.
BigBore585
CGN Regular
- Location
- Southern Alberta
^^^^ What he said.
ALSO for a 300 WMAG you could rechamber POSS ? or rebarrel for sure but you will need a new bolt because of the bolt face size ! RJ
nowarningshot
CGN Ultra frequent flyer
There is also the possibility of the action and magazine being too short for 300 wm. Further, many 30-06 are 22" barrels. Most want 26 for 300wm.
OP, there is one other option.
You could open up the chamber to an improved 30-06 cartridge. I used to have a reamer that was made up not to cut necks/throats. I needed separate neck/throat reamers to make up the "IMPROVED" chambers and make up reloading dies for those chambers.
The reamer was based on the 30-06 case. It was the same length, but with made initially for a one caliber long, 30 caliber neck. That means the neck of the 06 cartridge would only be .308 long, after the cartridge was fire formed. I had separate neck/throat reamers for 25, 264, 277, 284, 30, 33, 35 caliber bullets.
The sidewall was opened up to a one degree taper and the shoulder was at 40 degrees.
The resulting cartridges had a significant increase in powder capacity over the parent case. Enough to actually make a very noticeable difference in velocities and recoil.
Just about every caliber could safely have the velocities taken within a hundred fps of the Remington and Winchester magnum factory loads.
That was the problem for me. To much recoil.
I finally had the reamer cut down for 308Win cartridges. The last rifle I have left is a 338-08, that was build over 20 years ago. Very nice cartridge, with slightly better performance than the 338 Federal
You could open up the chamber to an improved 30-06 cartridge. I used to have a reamer that was made up not to cut necks/throats. I needed separate neck/throat reamers to make up the "IMPROVED" chambers and make up reloading dies for those chambers.
The reamer was based on the 30-06 case. It was the same length, but with made initially for a one caliber long, 30 caliber neck. That means the neck of the 06 cartridge would only be .308 long, after the cartridge was fire formed. I had separate neck/throat reamers for 25, 264, 277, 284, 30, 33, 35 caliber bullets.
The sidewall was opened up to a one degree taper and the shoulder was at 40 degrees.
The resulting cartridges had a significant increase in powder capacity over the parent case. Enough to actually make a very noticeable difference in velocities and recoil.
Just about every caliber could safely have the velocities taken within a hundred fps of the Remington and Winchester magnum factory loads.
That was the problem for me. To much recoil.
I finally had the reamer cut down for 308Win cartridges. The last rifle I have left is a 338-08, that was build over 20 years ago. Very nice cartridge, with slightly better performance than the 338 Federal
You can rechamber to .35 whelen and rebore to .35 cal, or re-barrel it. New barrel and install can be anywhere from $600 - $1000+ , depending on what barrel you buy and who does it. Rebore I believe is cheaper, but limited to who can do it.
Unless you get the .30-06 for free, its cheaper to buy a .35 whelen.
I don't think he wants a .300wm....He wants to rechamber a .30-06 or .300wm to .35 whelen.
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