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Bolt thrust / oily chamber??
Yesterday a mate was sighting in a 300 H&H. The fired cases all had what seemed like an 'oily finish.'
I seem to remember reading that the Proof House oil chambers to increase the back thrust on the bolt by stopping the case gripping the chamber walls (??).
He said he pushed a plain patch thro' before shooting but didn't clean the cases after sizing (with lube).
I was always told to clean the cases before seating. Also to patch out the chamber with acetone /alcohol or similar degreaser before shooting, so have never give this any thought.
Should it make any practical difference ?
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It is not unknown for a bolt to fail if there is excess oil in the chamber. It is always wise to dry the chamber and make sure the cases are clean before using them.
Leaving the case lube on could cause the case to pick up dirt which will be rammed into the chamber wall when the cartridge is fired.
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Cheers Enfield...
I guess it would also make the gun recoil feel 'sharper' then?
Don't think I'll experiment then !!
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'Sharper' as in 'ouch' or other four-letter expletive. Don't ask
Best without any trace of case lube (or bling polish)lol
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