Checking MV's w/ heavier .25 WSSM loads...

[wildgene]

...finally a day when I could get the chronograph set up for a few minutes to check some velocities w/ the .25 WSSM...

...115gr. VLD/ 44.5gr. RL-17/ 2.360" @ 3192fps...

...117gr. Sierra SBT/ 44.5gr RL-17/ 2.335" @ 3224fps...

...120gr. Speer HCSP/ 44.5gr. RL-17/ 2.360" @ 3204fps...

...velocities were almost 200fps. more than predicted, but there were no pressure signs w/ these loads (max 45gr. RL-17), I chronyed my .325 WSM loads (220gr. Sierra SBTs/ 63gr. RL-17 @2791fps/ est. 2800fps),my .300 WSM loads (165gr. GrandSlams/ 67gr. RL-17 @3224/ est. 3200fps, & 85gr. NBTs/ 48gr. IMR-4064 @3335/ est. 3450fps. rotating rifles, so none of them were heating up. Very surprised w/ the high velocities from the heavier bullets...

...now I need to find some 110gr. NAB's, since I pulled an antelope tag this year. Has anyone done any load development w/ the .25 WSSM???

 

[bbearhntr]

wildgene the best place I have found for WSSM info is here: http://forums.wssmzone.com/default.asp

Hope you are able to find what you are looking for. I have a 223 WSSM and am trying to get the 60g partitions to fly. If you have any pointers let me know, good luck!

 

[FOTIS]

Not bad at all!

 

[SJB358]

Those are great speeds. I can't say my 25-06 was doing any better than that! Looks like an excellent bunch of loads. Scotty

 

[wildgene]

wildgene the best place I have found for WSSM info is here: http://forums.wssmzone.com/default.asp

Hope you are able to find what you are looking for. I have a 223 WSSM and am trying to get the 60g partitions to fly. If you have any pointers let me know, good luck!

...uh, put a .22 cal. bronze bore brush in a drill & run it up & down thru the neck a few times? Neck tension seems to be the "Big One" on the WSSM's, due to the thick case walls & major size reduction to the neck (.544>.274 in the .223). Back when I was attempting to compete in benchrest, I weighed & sorted cases, turned necks, etc., etc., now I'm pretty much happy if they go "Bang" & travel in the same general direction, so I really don't obsess like I used to. Anyway, back to the WSSM cases & wssmzone, they're outside turning, inside turning, using neck bushing dies to get consistant neck thickness & tension, & remove the infamous "donut", a ring of brass that forms @ the inside base of the neck. The tighter the tolerances of your chamber (ie. custom rifles/ barrels), the more important the dimensions become, it depends on the lengths you are willing to go to. But the bronze bore brush removes all the little ridges & fissure in the inside case neck, giving you a lot more consistant neck tension, better accuracy for a small investment...