joelkdouglas
Handloader
- Jun 5, 2011
- 1,310
- 3
Started this in the rifles thread, but I'm moving it here to update. It's become a reloading topic!
First range trip yesterday (25 Apr).
The weather in ND is not optimum just yet...and the winds matched that white stuff.
It looks like she will shoot once I get her all figured out. This pic is fire forming brass loads. There are 10 shots on here, 5 in the upper middle shot at 25 yards. Then moved the target to 100, shot 3, adjusted the scope 2 clicks left, shot 2 more. These are all IMR4350 with 139 Hornady bullets. I think it's 65 grains IMR4350? I'd have to look at my notes.
Then I cleaned her to get the Dyna Bore Coat process all done, and moved on to 160 grain Sierra Matchking bullets with Retumbo. I hooked up the Magnetospeed for some pressure information...
73 grains 2977 and 2941 fps
74 grains 3004 and 2986 fps
75 grains 3084 and 3086 fps
76 grains 3119 and 3134 fps
I started seeing ejection marks about 74 grains. But oddly, two of the cases with 76 grains don't have ejection marks. There was also quite a bit of resistance chambering the rounds. I think I probably had the Matchkings seated into the lands, making the pressure spike. I didn't have a good way to measure the distance to the lands without fire formed brass; I'll be doing that today.
Then I put 3 rounds of 76 grains Retumbo with 160 SMK downrange...still work to do. I will try and make it back to the range tomorrow, and I anticipate loading 160 PTs first.
First range trip yesterday (25 Apr).
The weather in ND is not optimum just yet...and the winds matched that white stuff.
It looks like she will shoot once I get her all figured out. This pic is fire forming brass loads. There are 10 shots on here, 5 in the upper middle shot at 25 yards. Then moved the target to 100, shot 3, adjusted the scope 2 clicks left, shot 2 more. These are all IMR4350 with 139 Hornady bullets. I think it's 65 grains IMR4350? I'd have to look at my notes.
Then I cleaned her to get the Dyna Bore Coat process all done, and moved on to 160 grain Sierra Matchking bullets with Retumbo. I hooked up the Magnetospeed for some pressure information...
73 grains 2977 and 2941 fps
74 grains 3004 and 2986 fps
75 grains 3084 and 3086 fps
76 grains 3119 and 3134 fps
I started seeing ejection marks about 74 grains. But oddly, two of the cases with 76 grains don't have ejection marks. There was also quite a bit of resistance chambering the rounds. I think I probably had the Matchkings seated into the lands, making the pressure spike. I didn't have a good way to measure the distance to the lands without fire formed brass; I'll be doing that today.
Then I put 3 rounds of 76 grains Retumbo with 160 SMK downrange...still work to do. I will try and make it back to the range tomorrow, and I anticipate loading 160 PTs first.