Help interpeting OCW .260 remington.

[Warbone]

Been having trouble finding a good load for my Savage 12lrp .260 remington, but think i may have found some nodes.
All are three shots The top left and bottom left have 2 shots in the bottom hole, top left top shot may have been a flyer.
Which loads do you all think i should set up next.

 

[BLDTYLRY]

#3 & #4 would be my choices to continue testing. Do you have a chronograph? If you are doing your part the vertical stringing are velocity spikes and I tend to stick to loads that have minimal SD.

 

[seanhagerty]

I would use #3. #4 is a nice tight group, but it grouped in a different spot than #1,#2 and #3. That worries me when things change. I would shoot three and see how it works out.

Sean

 

[woodland-ghost]

45.2 gr would be my choice...your looking for poi, not group sizes

 

[Warbone]

I do have a chrono and the next phase i will be using it, i was thinking of trying 4 loads to narrow it down.
44.9 just too see if flyer was a flyer, or if the is a good note there.
45.2 seam like it might be un the middle of #1 and #3 so will try that.
45.8 want to see if this is a node
46.1 want so see if this is a node
5 shots each of these.
Where is Dan Newberry when ya need him

 

[woodland-ghost]

Just because it groups tight doesn't make it a node...several groups in a row with the same poi makes it a node

45.8 and 46.1 group well but have totally diff poi

 

[seanhagerty]

dan has his own website.

 

[Warbone]

46.4 seems to be a scatter node, i remeber reading somewhere that a certin % below a scatter node can be a optimal node but cant seem to find that info.
I have a tikka t3 scout .308 that has a good node about every .5 grains (its a awosme gun) so even if the poi are differant there still may be one there, worth a try i think.
It seems like the node might be between 45.2 and 45.5, maybe 45.3 or 45.4.

Edit****
I found info i was loooking for
This is a qoute from another thread on someone doing 155g palma in a 308

"You have a big time scatter node at 45.8 grains, which would point to an OCW at 46.4 grains. That's nearly right on the node we usually see with Winchester brass, Varget, and 155's.

Of course slight variations in lot numbers can skew this just a bit...

I'd go on and load these at 2.800", and test the area at 46.5 grains once again. Try 46.3, 46.5, and 46.7 grains.

When targets are not 100 percent conclusive, I normally look for the scatter node, add 1.5 percent to the powder charge, and suspect the OCW to be there in that area. Altering the seating depth will tighten the group, often considerably.

As others have said, late model Remingtons do tend to crater the primer dents, so I wouldn't go by that alone.

Good luck. Keep us posted.

Dan "

I looks like 45.5 may be a scatter node if i add 1.5% to that i get 46.1 which was a nice tight group at 46.1.
But that puts it close to 46.4 which looks like a big scatter node. If i add 1.5% to that put me about 47.0 to 47.1 as another node.

So far this savage is being really picky for me, wondering if the nodes are just small.

 

[trailrider121]

46.4 seems to be a scatter node, i remeber reading somewhere that a certin % below a scatter node can be a optimal node but cant seem to find that info.
I have a tikka t3 scout .308 that has a good node about every .5 grains (its a awosme gun) so even if the poi are differant there still may be one there, worth a try i think.
It seems like the node might be between 45.2 and 45.5, maybe 45.3 or 45.4.

I believe its 1.5% on either side of a scatter node, so it would around 45.7 or next node around 47.0 -47.2grs. I have found with little testing with 140gr a good node with H4831SC around 47.0grs with speed of 2800 with 24" barrel.

 

[Warbone]

Ya im guessing this rifle may have really small nodes.
kinda wierd though if a scatter node is 45.5, and the +/- rule hold that puts the nodes at 44.8-44.9 for minus node or 46.1 for plus node. both of which have good groups if i had a flyer on 44.9
or If 46.4 is the scatter node then minus 1.5% would be 45.7-45.8 which has a good group, or 47-47.1 which i havent tested yet.
My tikka rifle can have a +/- .2-3 grain change and still group under .75 inch.
this savage rifle may only have a +/- .1 grain tolerance

 

[trailrider121]

If your not seeing any pressure signs keep going up starting with 46.7grs to 47.3grs. Watch for pressure signs and report back. I bet you will find a node around 47.0grs.

 

[woodland-ghost]

What powder are you using?

 

[Warbone]

Its h4831sc
I think ill assume 46.4-46.5 is scatter node.
so ill try either 45.7-45.8 for lower node
and 47.0-47.1 for higher node

 

[Warbone]

Well here are new result. I think it just confuses me more.
45.7 had very good es/sd i forgot to do fouler and cold bore shot so first shot
was way right, next 3 shots grouped great, then last shot i could have pull but not sure.
47.0 is wired and 47.1 look like a scatter mode.

 

[trailrider121]

I wonder if your really running into compression issues, bullet pushing out. Not enough neck tension, had to say. Looks like 45.7-45.8 seems to shoot well. Maybe adjust col and tighten it up,,and recheck ocw with a 1% (.4grs) in both directions of 45.7grs. One loaded 45.3, 45.7, and 46.1. They should group under MOA.