I built on in 1962, it was called a .25 Nieder back then.It was a wildcat for a log time until Remington decided to start building rifles and ammo for it in the late 60's.
Back in the 50's &60's, lots of guys experimented with these types of wildcats. I do remember a 22-06. The main limiting factor back then was powder.How about a 22-06? lol That should push a bullet fairly fast.
I remember reading on some forum (maybe even this one) several years back about the 125 gr. 30-06 accelerator ammo. It pushed the sabot bullet at close to 4,000 fps, but the issue the poster had was that it shot poorly because the twist rate didn't stabilize the bullet as well as the 150-180 gr. bullets, and that the sabot left a residue in the bore that was a bear to get out. This is just anecdotal, as I have to personal experience with that load. It might be fun to try some out though since I do have two 30-06 rifles.How about a 22-06? lol That should push a bullet fairly fast.
Didnt they used to make those 22 caliber 30-06 excellerator loads that were 4000 FPS or something for a 30-06?