Have the new rifle, have all the makings for ammo, haven't had a chance to fabricate a case to use with the Hornady gauge as yet.

Guesimated the chamber length with a snugly loose projectile deliberately over length in the case. Worked it through the action, measuring the push back each time. Came up with a 2.9/2.92 avg.

Loaded up a ladder set yesterday

Rem Brass
140 gr AMAX
H4350 in 42, 42.5, 43, 43.5 sets
COAL 2.850

Anyone have any experience with the Criterion 260 Match chamber - am I in the right 'ball park' to develop a load from? Mainly interested in the COAL.