Hugnot
Well-Known Member
More on StaBall HD & the 6.5-06
I shot some groups & got some Magneto Speed chrony results
Groups tightened up a bit with another .5 grains of Staball HD, 56.5 on July 8. 57.0 on July 18. I replaced the trigger on my Ruger MKII with a Timney adjusted at a little less than 3 pounds for the group shot on July 18 & that helped. Groups fired without Magneto Speed bayonet.
Best group with ammo having extreme spread of 63 fps - needs improvement.
I used Rem 9 1/2M primers & Barnes 140 grain Match Burner bullets. Spreads were not OK - more work is needed. This might be a good time to use some of my carefully hoarded Fed 215M primers. Powder charges were thrown thru my old RCBS measure & not weighed except to set measure. Neck tension seemed ok but needs checking. Necks were turned to .289 & measured at .294 after firing. An easy slip fit with bullets & fired brass. Fed .30-06 brass necked down. I used a Lee .264 WM factory crimp die & put a minimum crimp on bullets. Easy extraction, no primer cratering, tight primer pockets - another .2 grains ?
Pic of rifle.
Ruger M77 MKII, McGowen #5 8 twist R5 barrel. 26 inches, Sightron STAC 4-20X50, MOA2 reticle, Weigand 20MOA base, Warne low rings, Timney trigger, Richards stock (plywood).
I
I shot some groups & got some Magneto Speed chrony results
Groups tightened up a bit with another .5 grains of Staball HD, 56.5 on July 8. 57.0 on July 18. I replaced the trigger on my Ruger MKII with a Timney adjusted at a little less than 3 pounds for the group shot on July 18 & that helped. Groups fired without Magneto Speed bayonet.
Best group with ammo having extreme spread of 63 fps - needs improvement.
I used Rem 9 1/2M primers & Barnes 140 grain Match Burner bullets. Spreads were not OK - more work is needed. This might be a good time to use some of my carefully hoarded Fed 215M primers. Powder charges were thrown thru my old RCBS measure & not weighed except to set measure. Neck tension seemed ok but needs checking. Necks were turned to .289 & measured at .294 after firing. An easy slip fit with bullets & fired brass. Fed .30-06 brass necked down. I used a Lee .264 WM factory crimp die & put a minimum crimp on bullets. Easy extraction, no primer cratering, tight primer pockets - another .2 grains ?
Pic of rifle.
Ruger M77 MKII, McGowen #5 8 twist R5 barrel. 26 inches, Sightron STAC 4-20X50, MOA2 reticle, Weigand 20MOA base, Warne low rings, Timney trigger, Richards stock (plywood).
I
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