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Hi, Contender:
Good question. Bores can run from .311 up to maybe .317. Lands should be .303 but I've seen some swallow a bullet put in the muzzle. The 5 groove barrel makes measuring a slug tricky, and you need a special V block to do it right. Marshall might have one. In general, those with the adjustable sight like you've got are tighter than those with the two legged peep (300 & 600 yards).
Which model is it? Sounds like a No. 4 Mk.I, but there are quite a few variations. Look on the left side of the receiver and note if it's been overstamped with something like No 4 Mk 1/2 (F) FTR. Does the serial number on the bolt handle match the number on the receiver? Look for a number (0-3) on the bolt head.
Bye
Jack
Good question. Bores can run from .311 up to maybe .317. Lands should be .303 but I've seen some swallow a bullet put in the muzzle. The 5 groove barrel makes measuring a slug tricky, and you need a special V block to do it right. Marshall might have one. In general, those with the adjustable sight like you've got are tighter than those with the two legged peep (300 & 600 yards).
Which model is it? Sounds like a No. 4 Mk.I, but there are quite a few variations. Look on the left side of the receiver and note if it's been overstamped with something like No 4 Mk 1/2 (F) FTR. Does the serial number on the bolt handle match the number on the receiver? Look for a number (0-3) on the bolt head.
Bye
Jack