chamokaneman
Member
First time I've ever tried develop a load using what I think is a form of OCW and I'm a pretty novice reloader. I picked a conservative max and shot 6 groups. The groups centers zig-zagged (as in several inches) quite a bit on the first three but the last three group centers show a definite flattening, only changing .50" to .75" from group to group. These 3 groups represented one grain of powder as I did the six in .5 grain increments.
So I took that one grain of spread and made 5 groups with .2 from group to group.
Group 1 // -1.80" group center
Group 2 // -1.63" group center
Group 3 // -.625" group center
Group 4 // +2.00" group center
Group 5 // +.25" group center
The plus and minuses are above and below the horizontal line I made for my group point of aims.
I feel like I should explore seating, etc between group 1 and 2 but the vertical spread on the individual shots in group 1 was terrible but not too bad on group 2.
I'm also intrigued by the last group just because it spread on the individual shots is the best of all the groups.
The load I'm building is for a .243 I'm going antelope hunting with this September. It's RL19 under an 80 grain hornady GMX with Federal 210 (as I recall primers) and factory winchester brass. My heaviest group (group 5) has 46.7 grains which is just .2 over what the Hornady maximum call for with no signs of trouble. On the other hand the Alliant data shows 48 grains as maximum for a 80 grain sierra bullet I believe.
So I guess my question play with seating between group 1 and 2 which is 46 grains even or explore a little heavier with maybe a group 6 and 7 or just do both?
Just curious...shooting is fun...reloading is also kind of fun but I don't want to $$$ or time.
So I took that one grain of spread and made 5 groups with .2 from group to group.
Group 1 // -1.80" group center
Group 2 // -1.63" group center
Group 3 // -.625" group center
Group 4 // +2.00" group center
Group 5 // +.25" group center
The plus and minuses are above and below the horizontal line I made for my group point of aims.
I feel like I should explore seating, etc between group 1 and 2 but the vertical spread on the individual shots in group 1 was terrible but not too bad on group 2.
I'm also intrigued by the last group just because it spread on the individual shots is the best of all the groups.
The load I'm building is for a .243 I'm going antelope hunting with this September. It's RL19 under an 80 grain hornady GMX with Federal 210 (as I recall primers) and factory winchester brass. My heaviest group (group 5) has 46.7 grains which is just .2 over what the Hornady maximum call for with no signs of trouble. On the other hand the Alliant data shows 48 grains as maximum for a 80 grain sierra bullet I believe.
So I guess my question play with seating between group 1 and 2 which is 46 grains even or explore a little heavier with maybe a group 6 and 7 or just do both?
Just curious...shooting is fun...reloading is also kind of fun but I don't want to $$$ or time.