Kampfjager
Well-Known Member
I use to push to higher grain weights, but as i get older brass life and forgiveness means more ....
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OCW opinions?
- Thread starter Kampfjager
- Start date
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birdiemc
Well-Known Member
I completely understand....I only ended up there cuz I used Hogdon website info for my load development on this one and went with their min and max, and 45 is what worked best.
Kampfjager
Well-Known Member
Ive had quite a few loads with varget in 308 that were 44-45 gr and worked great..... however, after 800y or so i think id pick a different tool....
The problem with this particular test is 1. your only using three shots and 2. just the smallest amount of shooter error can skew your data quite a bit. I would think it would be important to have a rather high powered scope and a very very stable rest. Lots of my shooting is with 10x scopes and, at least for me, I couldn't tell you if it was me or the load that was off 1/3". I've used this test and it has worked fine, as have numerous other "quick and dirty" load workups but they may not reveal the best load also. Kampfjager's gun looks to me like it really wants to shoot.
Kampfjager
Well-Known Member
I agree 100%.... and i think if i do my part its an acceptable 1/2-3/4 moa rifle.... hell itll out shoot me if im being honest, lol
Was the target oriented as shown when it was shot, or was it turned so the writing is correct?
If it was clocked differently when shot, then the results would be different, too, right?
Or am I missing something?
If it was clocked differently when shot, then the results would be different, too, right?
Or am I missing something?
Kampfjager
Well-Known Member
It was shot as the pick is.....what are you thinking?
birdiemc
Well-Known Member
Yes I believe you are technically correct but at 100yds would it make a huge difference?
birdiemc
Well-Known Member
As velocity changes, your vertical changes
I wasn't thinking vertical, I was thinking horizontal. If it was shot as is, then the 42.1 would have the least side to side, but if it had been shot turned 1/4 turn right, then wouldn't 43.1 win out?
IDK...
IDK...
Or am I looking at it wrong?
birdiemc
Well-Known Member
All other things being equal, a higher velocity will result in a higher POI, way more to it than this but easy way to remember that (and dont flog me for oversimplification) think of it as the bullet gets there quicker so less time for it to drop so it will impact higher on the target.
Kampfjager
Well-Known Member
Heres what i see (lines exaggerated some)...... vertical dispersion is very similar 42.9 through 43.3 which would indicate forgiving powder throws and changes to point of impact due to temp changes.....all 3 groups look incredibly acceptable as far as being well under 1/2 moa.....horizontal dispersion is good too.... now ill neck size only (which has no effect on OCW, only concentricity of the cartridge) and see what kinda groups i get at 300y..... im anxious to hear other ideas or opinions, thanks...to me the arrow indicates the node and it just happens to be the best group too.....
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birdiemc
Well-Known Member
You're correct in your assessment of vertical dispersion, but the OCW method has you look at center of group POI and find the 3 with the closest POI, ideally the same POI regardless of group size, as this is going to provide "forgiving powder throws and changes to point of impact due to temp changes."
But I dont see a problem with you working at 43.0. Looking at your target I think it's safe to assume you're a competent shooter, based on things you've said previously I'm certain you're much more experienced reloader than I am, so I think you'll be able to make it work.
But strictly going by the OCW method it's not the most ideal charge based on the 3 shot groups you posted.
Load em up and shoot 300yds, you'll know
But I dont see a problem with you working at 43.0. Looking at your target I think it's safe to assume you're a competent shooter, based on things you've said previously I'm certain you're much more experienced reloader than I am, so I think you'll be able to make it work.
But strictly going by the OCW method it's not the most ideal charge based on the 3 shot groups you posted.
Load em up and shoot 300yds, you'll know
