Interarms Witworth 375h&h magazine length

[Flyer375]

I have a .375h&h interarms whitworth that has to short of a magazine. The magazine measures 3.4. Is clearly to short for the lengthened action and the 3.6 COL of the .375. Has anyone seen this before? I was gifted the rifle by my grandpa who bought it new. He always seated them to mag length. I would like to load to full length. I have tried Numrich for a replacement and scoured the internet finding a solution, thus leading me to the knowledge on this forum!

Thanks

 

[sestoppelman]

Thats an odd one for sure. It should have the extended mag box. If you cant find one, any good smith can add on to yours.
Mine measures nearly 3.7" internally. I cannot imagine loading to only 3.4"!

Here is how it should look.

 

[sestoppelman]

I dont see your reply here for some reason but its in my email. To your question, the follower is standard, AFAIK, they only made one follower.

 

[Flyer375]

Thats an odd one for sure. It should have the extended mag box. If you cant find one, any good smith can add on to yours.

Mine measures nearly 3.7" internally. I cannot imagine loading to only 3.4"!

Here is how it should look.
View attachment 479524

I dont see your reply here for some reason but its in my email. To your question, the follower is standard, AFAIK, they only made one follower.

Thanks! For to info. Any suggestions of a gunsmith that would be familiar with these actions?

 

[sestoppelman]

I had some guys back east work on my other Whitworth, a .458 that had feed issues and they also rechambered a Mark X from 8x57 to 8x64 for me. I was pleased with their work and costs.
I am sure they could do this work.

GOSTOMSKI’S GUNSMITH SERVICE

BTW, I just checked the .458 and it has the same long box as the .375 and I am not sure why, but its a first year Whitworth.
Good luck on the project!

 

[Flyer375]

I had some guys back east work on my other Whitworth, a .458 that had feed issues and they also rechambered a Mark X from 8x57 to 8x64 for me. I was pleased with their work and costs.
I am sure they could do this work.

GOSTOMSKI’S GUNSMITH SERVICE

BTW, I just checked the .458 and it has the same long box as the .375 and I am not sure why, but its a first year Whitworth.
Good luck on the project!

I’ll contact them! Thanks for all the help!