:Hi Tatume
: My Ruger #1A 22" bl. really liked 140 Nosler Partitions with 46 gr. of IMR4320 for 2,940fps in FC 7mm Mauser brass, CCI 200 shooting sub .6" at 100 meters. This is a maximum load for my rifle so start lower and work in the direction pressure signs lead you, as normal.
; 175gr. Hornady SP's shot into 1.090" @ 100 meters with 42gr. 4320, CCI 200 and using WW .257 Roberts brass.
: 175gr. Horandy RN's ran 1.2" at 100 meters with the same load.
; 175gr. Hornady RN's ran .815" with CCI 200, FC Mauser 7x57 and 42.0gr. IMR 4895 for a near max. load around 2,500fps. I would work up with H4895 and perhaps Varget to take advantage of the Expreme/type powders.
; Using WW 7x57 brass, a load of 48.0gr. Reloader #22, & CCI 250 gave the 175 Hornady RN, 1.032" at 100 meters and the same bullet with 51.0gr. H450 & CCI 250 ran 1.3", same range.
: The old style Nosler Partition 175gr. liked 51.0 H450 & CCI250 for 1.025" accuracy.
: 160gr. Nosler Partitions(new) printed 1.088" with 53.5gr. H450, CCI 250, while the old style 160 opened to 1.188" same load.
; Sorry, no chronograph data on the heavy bullets.
: My newer BRNO 7x57 really liked 160gr. TS with 51.5gr. H4831SC for over 2,60fps and sub 1/2" much of the time, with an average around 5/8".
; All groupings are 3 shot(except for the BRNO with 5 the norm) & with a 3-9X scope. 3-shot groups are plenty realistic for a single shot rifle. Some #1's are prone to double grouping and/or stringing with 5 or more shots per group. I don't know if mine did this or not, as the barrel was allowed to cool between 3-shot groups. I free-floated the #1's barrel from the fore-end hanger with the wood bedded to the hanger itself using plastic steel and epoxy putty. The putty is all that's really necessary. Too, the 1/4 rib is removed from the barrel and .010" removed from the back edge to prevent binding on the action front as the barrel heats. This, along with bedding the hanger and floating the barrel is sometimes all that's necesary to prevent double groups or stringing wiht a #1. It worked for me on 2 of them.
; Sorry for being long winded - it's just me.
: Edited for spelling mistakes - may have missed some. My fingers move slower than my aging mind - Hmmmmm.