I am also running low on H4350 - is your IMR4350 load similar to what you were running H4350? ?
My CG/63 Military Match load was 140smk & 42.0g H4350 with FN target brass in winter but come August in 2nd string rapids the bolt got heavy... I moved down a node to 40.0g which is slower but still accurate at 200 yards, and no issues with heavy bolt.
Layton & Nashlaw, what do you two have for free-bore??
Both my military & factory M70 have long throats, so I load long. However I just got a Win 70 6.5x55 custom with a real short throat (a 123smk is 3.080 into lands with Stony Point, a 140smk is 2.970 ). It shoots really well loaded short, but I am still debating having it throated so I can use more case...