Thoughts on OCW test

[jsthntn247]

This was with Barnes 127 lrx in a creedmoor with H4350. These were shot with a .050 jump. Maybe play with seating depth at 41.0? Peterson's brass has less capacity than most so I was compressed at 42 grains.

 

[justinp61]

It appears the 41.5 has the least vertical.

 

[Rhovee]

How far?

 

[jsthntn247]

100 yarss

 

[lancetkenyon]

It appears the 41.5 has the least vertical.

I think 41.0 equals or beats 41.5 for vertical. And definitely for horizontal.

 

[MagnumManiac]

41 and adjust seating depth to see if it tightens up.

Cheers.

 

[Varmint Hunter]

IME - if you repeat the exact same OCW test you often get different results. A single test "may" provide misleading information. That's just my experience.

A faster powder might be a better choice. Varget, if you can find it, appears to work well in the Creedmoor with 100-130gr bullets.

Good luck

 

[Kansaswoodguy]

I'd probably try a different powder with those bullets also assuming your shooting off of a good solid rest and are capable sub MOA accuracy.

 

[waveslayer]

That test doesn't have enough data or shots to say much, looks very spread out. Normally for OCW you have almost 10 loads to track nodes. .5 variance is too large of a spread. Do groups of .3 for the Creedmoor. Read Dan Newberry's sight, follow it exactly

 

[J-B welder]

I am absolutely NOT an expert so take that into consideration. OCW isn't about the group size or shape, it's about the POI shift between groups. It looks to me like the group centers shift the least between 41.5 and 42.0. If you download Gordon's Reloading Tool (free) you can use their group center calculator to confirm how much shift you have between group centers. If it turns out my ocular estimate is right, I'd try playing with seating depth at 41.7. If 42 was the first charge you noticed the powder compressing I wouldn't worry about it. Tap the case a few times after adding the powder to settle it a little if you want.

 

[Rhovee]

Looking at your target. You need to work some things out. Maybe take your best group and do seating depth then come back to it. Those are some pretty large groups for 100 yards. Here is one I did recently. One is upper node and one lower. Granted I do shoot a lot, I just did two shots each on first test. Then three shots when I was testing primers. This load ended up shooting 2.3" at 600. The 59.6 with BR2

 

[waveslayer]

Looking at your target. You need to work some things out. Maybe take your best group and do seating depth then come back to it. Those are some pretty large groups for 100 yards. Here is one I did recently. One is upper node and one lower. Granted I do shoot a lot, I just did two shots each on first test. Then three shots when I was testing primers. This load ended up shooting 2.3" at 600. The 59.6 with BR2

+1

 

[jasonco]

Yeah, that target shows, you got some work to do at the bench. If you'v a faster powder, use it for that bullet weight? That 6.5 Creedmoor OCW target, should be way more tighter than that!

 

[Mrvmax]

That test doesn't have enough data or shots to say much, looks very spread out. Normally for OCW you have almost 10 loads to track nodes. .5 variance is too large of a spread. Do groups of .3 for the Creedmoor. Read Dan Newberry's sight, follow it exactly

I agree with this, there's not enough data to go by.