I load my son's Ruger M77 with 120 Nosler Partitions to an OAL of 2.97" and they're still .25" (yes, 1/4") off the lands.....by the way, the same OAL on my Remington 700 Classic and the bullet jump is only .02.
Both very accurate, but the Remington shoots less than 3/4".....I'm still tweeking that one. 48 grains H4831 SC
Regarding my Ruger .257 Roberts (and the .300WM for that matter), I like to joke that my loads couldn�t touch the lands with a stick. Perhaps when I get home tonight I�ll check and see what the distance to the lands is � don�t have that data with me.
As to accuracy, my Ruger also does very well. Last night I updated my chrono spreadsheet with target data from last weekend � 3 shots in 0.625� at 100. I noticed that my previous target data had been shot exactly one year earlier � with a group size of 0.65�. Gotta love it!
FWIW, your H4831SC charge is a half-grain higher than my 47.5g charge for the A-Frame. My 120 Partition load runs 2.896� COL and uses 46.0g H4831SC for 2904fps, but accuracy is not as good as with the A-Frames. All my .257 loads use WW +P brass and CCI 250 primers.
