Pre-64 Winchester mod 70 action for custom build?

[358 Norma]

How hard would it be to convert a Pre 64 Winchester mod 70 300 H&H to 470 Capstick? What would have to be done for this conversion to work?

 

[RedTag]

Very cool idea. Curious if anyone around here has done this specifically with a pre-64 H&H, rather than a post-64 Classic. Following with interest.

 

[PanhandlinPat]

I’ll note that the mag box is wider on my ‘48 model 70 than my classic. The 48 actually fits 404 Jeffery cases quite nicely. Stack almost like it was made for it. They don’t stack well in the classic. I imagine it would be just a matter of screwing a 470 barrel on.

 

[358 Norma]

I’ll note that the mag box is wider on my ‘48 model 70 than my classic. The 48 actually fits 404 Jeffery cases quite nicely. Stack almost like it was made for it. They don’t stack well in the classic. I imagine it would be just a matter of screwing a 470 barrel on.

That's what I'm not sure about, I've been told that a pre 64 mod 70 can be tricky to get to feed right.

 

[Uncharted_NT]

Few things to consider with the pre-64 actions. I believe there a 3 different mag sizes, with 300H&H being the longest. I have a custom 458WM built on a pre 64 action but would go with a post for future stuff. Also easier to convert a post 64 to 458Lott that a pre so im told, so not sure how your capstick would go. Also a shame to change a pre 64 300H&H if its a nice rifle.

 

[baxterb]

Few things to consider with the pre-64 actions. I believe there a 3 different mag sizes, with 300H&H being the longest. I have a custom 458WM built on a pre 64 action but would go with a post for future stuff. Also easier to convert a post 64 to 458Lott that a pre so im told, so not sure how your capstick would go. Also a shame to change a pre 64 300H&H if its a nice rifle.

It;s not just the length on the pre-64 mag boxes. They have proper taper and inside rails, and given the 300 H&H taper, I doubt a factory box would work straightaway.

 

[Uncharted_NT]

It;s not just the length on the pre-64 mag boxes. They have proper taper and inside rails, and given the 300 H&H taper, I doubt a factory box would work straightaway.

Agree. Would be a mission.

@358 Norma, here is 300 H&H and 470 Capstick side by side for comparison:

 

[358 Norma]

Agree. Would be a mission.

@358 Norma, here is 300 H&H and 470 Capstick side by side for comparison:

View attachment 717783

But is it doable?

 

[baxterb]

But is it doable?

Yes. Kevin weaver has done it.

 

[Uncharted_NT]

But is it doable?

Anything is doable with a good smith and throwing money at it.

 

[Surgeon1]

Yes. Kevin weaver has done it.

He has a very nice used one for sale right now! It's near perfect and is a proven rifle on Buff and Elephants Listed on GI

 

[358 Norma]

He has a very nice used one for sale right now! It's near perfect and is a proven rifle on Buff and Elephants Listed on GI

I seen that one!