223 OCW test

[jpmimproved]

Thoughts? RL15 and 69 TMK @100 Benchmark 1:8"

 

[USMCDOC]

Thoughts? RL15 and 69 TMK @100 Benchmark 1:8"

If you are not at pressure yet.. 24.7

 

[LitLBoy]

23.9 24.1 move seating depth in and out .002 increments total of .006 both ways.
LitLBoy

 

[snowpro440]

24.8 and 25.0 ? Maybe even 25.4 to get it .

 

[pacificman]

I say 24.3 as the poi is the same as 24 and 24.6 ....now you can do a seating depth test to tighten groups.

 

[Clancy]

There have been some replies to this thread that I really didn’t understand. I think the obvious answer here is to load somewhere between 24.3 and 24.6 and fine tune your seating depth.

 

[Clancy]

23.9 24.1 move seating depth in and out .002 increments total of .006 both ways.
LitLBoy

Can you explain why you chose this charge?

 

[Clancy]

24.8 and 25.0 ? Maybe even 25.4 to get it .

I agree it wouldn’t hurt to push it further assuming that the load is safe. Might be another flat spot up there.

 

[FURMAN]

There have been some replies to this thread that I really didn’t understand. I think the obvious answer here is to load somewhere between 24.3 and 24.6 and fine tune your seating depth.

I agree with this. It is obviously between these two. 24.0 is a scatter node.

 

[BradY]

Load 24.4 at varying seating depths to tighten it up. Then after you have that load, shoot it with a few different primers over a reliable chrony and watch your spread.

 

[Zero333]

24.6

 

[jpmimproved]

No pressure signs yet, but don't want to push it too hard since I was shooting at about 50* and it's mostly warmer than that where I shoot. Was planning on loading slightly lower on the node since I don't want to load two different loads for hot and cold weather

 

[LitLBoy]

Water line looks good and less horizontal than the 23.4 charge. And yes 24.8 or 25 just might answer all the questions.
LitLBoy
PS What makes 24 a scatter node?
Thanks

 

[bench]

My first thoughts would be to tighten up the powder charge to only .1 grain at a time as the small 223 case at .3 grains you may be missing some some nice groups to load around and do the OCW test again if you wish to.
Then start with seating depth test after you completed the OCW test.
I only do one change at a time much less confusing.

 

[bench]

This is a example of my 223 OCW test at 100yds and shooting at 1/2" dots with only a .1 change in powder charge

 

[Clancy]

Water line looks good and less horizontal than the 23.4 charge. And yes 24.8 or 25 just might answer all the questions.
LitLBoy
PS What makes 24 a scatter node?
Thanks

I think you’re looking at the target the way it is posted and not the way it was fired. I believe it was set up 90 degrees counter clockwise from the way it appears on your screen.

 

[LitLBoy]

Yes, that would be a big difference, my bad.
LitLBoy

 

[fyrewall]

For my purposes this would not be very valuable as the groups were only three shots each, despite lots of groups, the range was restricted to 100 yards and velocities were not measured. In my thinking 69 grain bullet loads for a .223 with a 1-8 would be intended for ranges up to and including 600 yards; at that distance velocity spreads would be a consideration. Many tight 3 shot groups have been fired at 100 yards but have had considerable velocity spreads. A .1 grain powder charge increment is .4 percent of a 24 grain charge and might not affect much of anything.

If possible testing at 300 yards and even better at 600 might be more definitive.

 

[FURMAN]

For my purposes this would not be very valuable as the groups were only three shots each, despite lots of groups, the range was restricted to 100 yards and velocities were not measured. In my thinking 69 grain bullet loads for a .223 with a 1-8 would be intended for ranges up to and including 600 yards; at that distance velocity spreads would be a consideration. Many tight 3 shot groups have been fired at 100 yards but have had considerable velocity spreads. A .1 grain powder charge increment is .4 percent of a 24 grain charge and might not affect much of anything.

If possible testing at 300 yards and even better at 600 might be more definitive.

I will have to respectfully disagree. OCW is best performed at short range to keep outside factors out of play. A ladder is best performed long range looking for small vertical. I can not argue that a ladder is not better. I, however, have seen no difference in my loads developed with a ladder versus an OCW. I personally feel you can find the load quicker and with less components with a ladder. I have yet to see a node found with the OCW not perform long range.

 

[Chrs_28]

I have found in my load work ups that a OCW and Ladder are two ways to find the same result. Chrono is your friend for sure. A low ES also should go hand in hand with the “OCW”.