Ned,

No problem, this has piqued my curiosity.

And the answer is .....

This is a Hornady 220 grain SP gently pushed to the lands of the new Criterion 30" barrel with a Stoney Point gauge .  This indicates that I would be able to load "long" without doing a thing to the throat.

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It would be nice to compare with an "as new" Springfield barrel.   The closest thing I have without digging through several safes is No. 8828, an 1892 with modifications of 1896.   The bore and throat look "as new" to my naked and aging eyes.  Here is that same Hornady 220 grain SP pushed gently to the lands in No.8828:

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The throat is slightly longer.  How many rounds has been put through this tube is unknown to me, but probably not many, at least not in Whistler-Aspinwal days.  Contemporary powders had high nitroglycerin content and would "eat" throats much more rapidly than we modernfolk are used to.   I purchased this rifle some years ago from a long-ago retired Air Corps officer.  I didn't quiz him about his use of it.  The interesting things about this particular rifle are the M1901 sight with large aperture, handguard and front sight that look like they "belong", not like they were added some long time after the rifle left government ownership, it came with an original (not reprpo) muzzle cover, and a nice 1942-dated Boyt M1907 sling, obvously used, but not abused and well cared for.  The groove diameter of this barrel is .3094".

Resp'y,
Bob S.