Help with custom Rem 700 action or other host action
I want to start work on a custom .500 whisper project. I will be slinging very heavy slugs at subsonic velocities. Due to the brass that I was going to use, I was going to use an action I already have which is a 700 short in .222. The bolt face is right, the price is right (free), etc BUT the action is not long enough, I need to accommodate a 3.0-3.1" cartridge which means I will have to heavily mod the 700 short.
The thought came to mind to see if I can just sell my complete .222 rifle and get a new 700 long with a .222 or .223 (same) bolt face? I have no need to buy new but not sure which direction to go. I will list a few specifics that I need. I should mention that I own a machine shop so some mods including the barrel chambering and threading will be done here.
1. Must be an action that I can get parts for, 700 seems perfect here
2. Must be able to mod the action for clip and make or buy removable mags
3. Common enough geometry that I can find a tactical stock to work.
4. CHEAP. Build is on a budget but I don't need junk.