New F-Class Rifle build

Ruthless said:
Another nice looking rig, wow :cool:

nice barrel block on it

is it fully floated action+barrel??
Click to expand...

Yes, the block is pillar and glass bedded, the action sits about 50 thou off the bedding (5 layers of 10 thou tape applied during bedding), and the bbl is floated as well.
 
Looks like 48gr is the best load with anything higher starting to be 'hot'. If that dip in velocity at 48.2 is repeatable, that is a nice indicator that pressures are about to spike.

Accuracy at 48gr is also excellent at 100 and 300yds. Your node is 48 to 48.2gr. I would stick the powder dispenser at 48gr and you will stay within this node even with a bit of dispenser error. I am also going to speculate that the group was nice and flat.

If the ambient temp really goes up, you may find 47.8gr to be very good too.

Your velocity rockets up past 3300fps with only a small powder increase. I wouldn't be looking for anything hotter. You are in 257 Wby territory in a case 2 sizes smaller. The Shilen is a fast barrel but we be in spicy territory for sure now.

Did you get a chance to run the pressures on Quickload?

Glad that the barrel is shooting 1/4min at 300yds. AWESOME.

Jerry
 
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