8mm-300win

[jtoews80]

Has anybody successfully built a 8mm-300win using an existing 8mm JS barrel, simply recutting the chamber to see waht this rnd can do? Or is that a waste of time considering that most 8mm's have had a lot of FMJ and nickle rnds thro them and the rifling process used on these guns was 70 year old technolgy? The 8mm-300 Win is a utility sort of wildcat I'd guess built on mauser 98's with a rechambering and possibly new stock and bolt turn. The ballistics should be similar to a 325wsm since the parent case to it is the 300wsm and that mirrors the 300win mag within 10 fps. I'm not sure what the differences in case volume are, but am merely curious.

 

[Guest]

Never heard of an 8mm-300, but I have heard of the 8mm-06. I don't think the -06 version offers enough gains over my 8x57 to worry with the cost of reaming. The 8mm-300 might. Of course, for what you spend on the whole thing (labor and all) you could nearly just rebarrel it to whatever you'd like, which would open up all sorts of possibilities.

 

[roysclockgun]

I am not convinced that you gain much with 8mmMauser/300WinMag. I have owned and worked up hand loads for both 8mm-06 and 8mm-06AckleyImproved. By time I found the hotest load that I could use in either cartridge, I was not getting more MV than I could from 30-06, using the same weight bullet.
IMO the entire exercise of the 8mm bullet replacing a 30cal bullet, only had it's day, when returning US Vets could not get ammo for their war trophy German Mausers. I have seen WWII German Mauser rifles rechambered in everything from 22-250, up to belted mags (probably hazardous).
In 1945, all the sporting arms manufactures had to regear up to produce sporting arms again. They either made firearms, or something else for Uncle Sam, during the war, because they could not get material to make sporting arms during WWII. Many Vets waited until the late '40s and even into the early '50s, before models of sporting arms that they wanted again became readilly available. My Uncle ordered a Mod 70 in 220Swift, upon returning from the war in 1945. He was unable to take delivery until 1948! My point being that since Vets could not find Remingtons or Winchesters, they had their German Mausers or Japanese Arisakas rechambered for some cartridge that they could either buy off the shelf or produce at the relaoading bench. Most of those wildcats have fallen from favor these days.
The 8mm/300WinMag would be a fun project.