Thanks

- Thread starter SWWI Shooter
- Start date

Thanks

I normally start with powder charge and try to get to a flat spot at roughly the speed that I am looking for. After that I adjust seating depth to tighten my groups up.

Likes:
Pvt.Donut and LRI

So why is doing load development at 100 yards the problem?

Likes:
Stpilot12 and Apnea

Shooter error

Wind

I would suggest shooting at 100 yards for groups then using a chronograph to check for es and sd.

Now that being said he already has a 1/2 moa load if it was me I would take that 1/2 moa load and shoot it out to a further distance than 100 yards to check for vertical stringing.

Shooter error

Wind

I would suggest shooting at 100 yards for groups then using a chronograph to check for es and sd.

Now that being said he already has a 1/2 moa load if it was me I would take that 1/2 moa load and shoot it out to a further distance than 100 yards to check for vertical stringing.

Find your max charge, at your maximum acceptable overall legnth. The max overall length may be dictated by mag length, you may be one who is comfortable with the bullet kissing the lands, maybe you won't go closer than .005" off the lands, whatever you decide max acceptible length should be.

Then back off the charge 2% and start seating deeper by .005". By doing this you are attempting to find where the optimal pressure curve and optimal barrel timing converge. I usually find a good node by the time I've gone 0.40".

I've had good luck with this method. I don't know that it produces the absolute smallest groups, but it seems to produce usable loads that are as forgiving as they probably can be, and they have held up well at long range.

The big benefit to me, is that it is fast. I don't have a lot of time these days to screw around with load developement. I need something relatively forgiving and "good enough" in the accuracy department so I can take it to the mountain when I do get time to shoot.

ES/SD is 1 of many factors to look at. You should be choosing your OCW based off POI, not group size or ES. Then you should be doing a seating depth test to shrink group size. After that go shoot to 500 to see how your load performs. Then shoot a minimum of 25 over the chrono to get a realistic SD.

This method has been proven and worked for a long time. We dont need to reinvent the wheel here. Its best you read the exact method to ensure you are doing it correctly. Then post up your target if you need help choosing your OCW in the center of your node.

http://optimalchargeweight.embarqspace.com/ocw-instructions/4529817134

Houston- So you're saying that you aren't looking for low velocity extreme spread but rather a flat spot in velocity like you would see in a ladder test? So what is your initial seating depth when you are doing this initial test?