You said they are both Savage Model 110's, so that would make them both long actions (3 digits = long action, 2 digits = short actions). You could use either one of them, however you would need to get a new Bolt head and install it on the end of the bolt. You can call Sharp Shooter Supply and talk to Fred and he will tell you exactly what you need to switch them over. It takes 5-10 minutes to change the bolt face.
Savage actions come in 2 different size barrel shanks. Some of the earliest RUM's in the savage were on the small shanks (what you have) 1.055". Later all the RUM and WSM Savages were built on larger shank barrels 1.120".
You can order RUM, WSM or Edge (338-300 Ultra) barrels from several companies in either large or small shank.
I'm building an Edge on a Short Action Savage (model 12) that was originally a 300WSM (Large Shank). Short Actions will eject a spent 338Edge brass, but to eject a loaded round, the bolt must be pulled. It will obviously be a single shot.
Hope this helps,
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