25-06 to 264 win mag
- Thread starter Deahl
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would it have to be machined out or get a whole other bolt?
That I am not sure as I have no personal experience with that particular rifle. I imagine spare bolts for that particular rifle would be difficult to find.
If you can't machine the bolt face one other alternative you could look at would be the 6.5 Weatherby RPM, similar performance to the .264 Win Mag but has a standard .473 rim so you wouldn't have to modify your action.
weatherby.com
If you can't machine the bolt face one other alternative you could look at would be the 6.5 Weatherby RPM, similar performance to the .264 Win Mag but has a standard .473 rim so you wouldn't have to modify your action.
6.5 WBY RPM - Weatherby, Inc.
6.5 WBY RPM (Rebated Precision Magnum) Weatherby has traditionally designed and built ultra-high velocity cartridges with unique case designs-belted magnums with a double-radius shoulder. This is seen in all of the existing Weatherby cartridges until now. The Mark V 6 lug standard action has...
weatherby.com
BallisticsGuy
Well-Known Member
It's a CRF bolt face if I recall correctly which means it should be able to have the face opened up pretty easily.
shortgrass
Well-Known Member
And if it's CRF the extractor will need work, too. I don't know if the Ruger uses a dedicated magnum follower for it magnum chambered rifles, or not.
Hugnot
Well-Known Member
I would prefer to convert the .25-06 to a 6.5-06 or a 6.5-06 AI (Ackley Improved). Same size .473.
The Ruger M77 MKII is a controlled feed bolt gun, & in .25-06 is of the length for .30-06 rounds
As mentioned the bolt face would need to be opened up and the extractor modified, an extra expense. The hardened steel bolt face requires some attention to open up.
The magazine box would need to be replaced with a magnum type. Comparing the .30-06 magazine boxes with 7 Rem Mag boxes it can be noticed that the mag box is fatter and the follower slightly wider. The stock would need minor modifications to accept the fatter mag box.
The 6.5-06 is a high performance round and is very popular meaning easy obtained brass using .25-06, .270, & .30-06 and relatively low cost dies. Lots of reload data available.
The AI (Ackley Improved) version gets about 100 fps more velocity but requires fire forming and additional expense dies.
Both rounds like H1000, RL26 with 140 grain bullets and RL23, H4831 with 120-123's and H4350, RL16 with 100's. More than adequate big game performance with 140's, fine long range yote/chuck with 120-123, and real good splat factor with 100's (3400 fps) but no prairie dog gun.
I would suggest, if more is needed than a 6.5-06 get a rifle chambered for a real big 6.5.
The Ruger M77 MKII is a controlled feed bolt gun, & in .25-06 is of the length for .30-06 rounds
As mentioned the bolt face would need to be opened up and the extractor modified, an extra expense. The hardened steel bolt face requires some attention to open up.
The magazine box would need to be replaced with a magnum type. Comparing the .30-06 magazine boxes with 7 Rem Mag boxes it can be noticed that the mag box is fatter and the follower slightly wider. The stock would need minor modifications to accept the fatter mag box.
The 6.5-06 is a high performance round and is very popular meaning easy obtained brass using .25-06, .270, & .30-06 and relatively low cost dies. Lots of reload data available.
The AI (Ackley Improved) version gets about 100 fps more velocity but requires fire forming and additional expense dies.
Both rounds like H1000, RL26 with 140 grain bullets and RL23, H4831 with 120-123's and H4350, RL16 with 100's. More than adequate big game performance with 140's, fine long range yote/chuck with 120-123, and real good splat factor with 100's (3400 fps) but no prairie dog gun.
I would suggest, if more is needed than a 6.5-06 get a rifle chambered for a real big 6.5.
David Emerson
Well-Known Member
Your bolt can easily be opened up to a magnum. Follower works. Easy conversion. If you handload I would consider the 6.5x280 ackley improved if you want a 6.5. Right on the heels of the 264.
blackbrush1
Well-Known Member
or do a 6.5 RPM
Stick with the quarter bore and get a 7 twist barrel
What he said.
Hugnot
Well-Known Member
Lots of input here.
Looking at the receivers for both standard and magnum cartridges, R M77, MKII shows that they are essentially equal in dimension. Ruger/Pine Tree Castings claims they can hold tolerances within .007 for their investment castings.
The difference is in the magazine box. The front top (bent in feed lips) of the magnum magazine box measures .805, for the standard magazine box .695 - a big difference of .11 inches. The bottom front(s) of both magazine boxes are much identical, .925 standard, .955 magnum. The lengths are about equal .010 (+-). All this means is that a standard long action M77 MKII will accept a magnum M77 MKII magazine box. Very minor stock work might be involved - like less than 5 minutes.
The front of the standard follower measures .680 and the magnum .715.
My thinking is that I would need to pay $75 to open up the bolt face, modify the extractor and get a new magazine box and follower for the fatter cartridge. I guess the additional cost would be $110, depending on availability of parts. This is more of an incentive to stay with a .473 cartridge and live with 100 fps or so less velocity. This is why I have 2, 6.5-06 rifles. Just love the cheap brass also.
Looking at the receivers for both standard and magnum cartridges, R M77, MKII shows that they are essentially equal in dimension. Ruger/Pine Tree Castings claims they can hold tolerances within .007 for their investment castings.
The difference is in the magazine box. The front top (bent in feed lips) of the magnum magazine box measures .805, for the standard magazine box .695 - a big difference of .11 inches. The bottom front(s) of both magazine boxes are much identical, .925 standard, .955 magnum. The lengths are about equal .010 (+-). All this means is that a standard long action M77 MKII will accept a magnum M77 MKII magazine box. Very minor stock work might be involved - like less than 5 minutes.
The front of the standard follower measures .680 and the magnum .715.
My thinking is that I would need to pay $75 to open up the bolt face, modify the extractor and get a new magazine box and follower for the fatter cartridge. I guess the additional cost would be $110, depending on availability of parts. This is more of an incentive to stay with a .473 cartridge and live with 100 fps or so less velocity. This is why I have 2, 6.5-06 rifles. Just love the cheap brass also.
blackbrush1
Well-Known Member
friends don't let friends shoot Rugers
