They're (hydraulic jacks) not that expensive. Me, I favor a basic bolt-down barrel vise, and my boss has a welding table that has been drilled for it that goes about 1800 pounds. We move it around with a fork lift when it needs to go someplace.
Now as to barrels, I have pulled more Mauser and Enfield barrels than I have Mosin Nagant tubes, but some of those were very, very tight. The basic thread is a standard right hand thread, and it breaks loose like a lug nut. You do not want to have any play in your action wrench. If that slips, and your barrel is one of the "RustoFreeze Rotchakokoff Specials" you can distort the receiver ring and turn your Mosin into a paperweight.
If you decide to buy a reamer, let me know, I might be willing to buy you out of it after you are done.
Pistol keeps me safe.
Shotgun keeps me fed.
Rifle keeps me free.