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Hope it shoots good for you
 

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Discussion Starter · #6 ·
Range report
Photograph Facial expression Black Wood Rectangle

Font Number Paper Temperature Pattern

This is the 2nd step in the load development process. The 1st step was to blow out the brass with Bullseye and play dough using an old barrel. Next time I’ll use wax instead of the play dough. This time I loaded a mild charge and then started working with the bullet seating depth. These were the best results of the day. I’ll finish shooting the rest of the brass with this load to complete the brass forming. The next go-around I’ll work up to the max charge and should find a sweet spot somewhere just north of 3000 FPS. We’ll see…
 

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numbers look too close to call for me, targets are all very good. I don't know how one would pick one or the other...or how anyone can trim that accurately to get them all to 0.001" I know I can't! LOL

Looks like she's a shooter though, and again, a good driver makes all the difference! Well done!
 

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THAT looks like a Boring rifle. Every one goes in the same spot!
Looks perfect to me.
 

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Discussion Starter · #12 ·
Thanks guys.

Hi Shane, re: the charge, 51.00 on the Harrells averaged out to 28.0 grains, but then that will vary with humidity. So, on my next outing I’ll repeat the exercise with weighed charges. We’ll see…

Re: case length, the researching I did seemed to indicate folks were trimming to the 1.490”. Well that’s a lot of metal removal with a manual Redding case trimmer as the Lapua brass I’m using is measuring about 1.503”. Removing.003” is a lot easier than removing .013” In fact, it was taking two passes to achieve!

At this point I’m going to trim to the 1.500”.
 

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Discussion Starter · #16 ·
BTW, the barrel is coated with a product from Cerakote called, “Transfer Grey”. It is designed to dissipate heat and it seems to work pretty well. It is used in the automotive racing industry on things like radiators. A disadvantage, I noticed is there is more mirage from the heat coming off the barrel, so a heat shield is necessary.
Liquid Bottle Fluid Plastic bottle Chemical compound
 

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Discussion Starter · #18 ·
LMOA… Good observation George. Cerakote also makes a high temperature coating that can go straight to room temp water from 1800°F - without cracking. It was originally produced for piston heads and exhaust components, but it works well for suppressors too which get very hot. So that’s why I have it, but occasionally I get a Motorhead in the shop who wants me to coat their heeders.
 

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Discussion Starter · #19 ·
Good morning all! It appears the gun will shoot when driven well…
Air gun Trigger Machine gun Shotgun Gun barrel

GreyFox and I went down to AL to shoot a UBR match Saturday and I got lucky. Rick took home 1st place in the Unlimited class, shooting a 220 Beggs. We had a great time and a nice sunny day, albeit a bit windy. My next build, which is underway, is a PD rifle in 20 VarTarg on a 788 Rem action.
 
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