efm77
1. The rifle in question is a long action and the WSM cartridge was designed for a short action.
2. A 24 inch or longer barrel would be needed for the .270 WSM, .270 Weatherby etc for a worthwhile velocity gain.
3. Other than converting the .270 to the .270 AI a barrel change and bolt modifications will be required to go to the WSM or any other cartridge.
I damaged two Remington rifles in the 1970s because I took the advice of a coworker and lubed my cartridge cases when fire forming them. Both rifles had bolt setback and increased headspace, and ever since then I have very conscious of the words "bolt thrust" and firearms damage.
You are correct that most commercial rifles have a safety factor of twice the normal chamber pressure built in before a catastrophic failure will occur. BUT this does not mean that increased bolt thrust will not cause bolt setback and increased headspace and damage any rifle at lower chamber pressures.
17 rem savage asked a question about possible conversions of his .270 Winchester with the intent of getting more horsepower. 17 rem savage already has the .270 Winchester a classic hot rodded cartridge with a rated chamber pressure of 52,000 cup or 65,0000 psi and doesn't' really need more horse power. If I had a .270 Winchester with a 24 inch barrel I would concider that as close to perfection as possible.
Before I shoot any of my rifles a wet patch with lighter fluid on it is used in the chamber and barrel to remove any traces oil.
[img width=600 height=398]http://i122.photobucket.com/albums/o254/bigedp51/oilcover.jpg[/img]
[img width=600 height=373]http://i122.photobucket.com/albums/o254/bigedp51/oilinchamber.jpg[/img]
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