24" 1:8" Proof Sendero contour
Hornady brass
Fed GM210M
Hodgdon Superformance
143 ELD-X
2.2605" CBTO (.005" jammed)
2.8965 COAL
Brass weight sorted 147-150gr after full prep
Annealed neck/shoulder
Ladder test:
41.0 to 47.5gr. charge weights. 48.0 I did not shoot.
2565 to 2966fps (on 47.5gr: no flattened primer, no cratered primer, no ejector mark, possible very slight case head swipe?, easy bolt lift)
Charges had 3 distinct nodes with little velocity increases, very little vertical dispersion @ 352 yards. Then a jump in speed to next node, but still little vertical separation until I hit 47.5gr. Had a 2" jump in elevation, and possibly a very slight sign of pressure, so I quit. Best node will be in the 2800-2850fps range, with a 4 charge weight (2.0gr.) group with 1/2" of vertical separation with 2-9mph fluctuating wind. Shots 8-11. Throw 12 & 13 in there, and still a good node.
Something to be said about stiff barrels and a mild recoiling round.