Last night i had an idea to use a pop can and the paper hole puncher and cut out some nice little round discs and see if they'd fit the primer pocket of the Apex' breech plug. It was a perfect fit and snug. I ended up making a few and found that 3 of these shims " 2 aluminum and one very thin brass shim stock shim" adjusted the head space perfect and allowed for a slight crush fit.

I drill holes in the shims today and tried 2 of them in the plug, took 3 shots and noticed just a tiny bit of soot inside the frame, cleaned it at the house and added one more shim for a total of 3.

Ended up firing 12 shots total and ZERO primer blow by.

I also ran into an excellent shooting load that just needs some minor tweaking and that load was 60gr BH209 and coreys custom cast .451" 405gr bullet in a harvester black smooth sabot. This Apex loved that load. Once i sat down to see how accurate they were, if i allowed the barrel to cool down, they'd cut holes at 50 yards. So this is a load i really want to experiment with more later on. I call that bullet the Big Nasty!

Absolutely beautiful cool day of 85* and perfect for some experimenting.

I do think i will try to find an actual washer to take the shims place as it will be beefier. I just hate the filing to fit part LOL.

That's a simple process Devil. Put the washer on a round head machine bolt with a nut holding the washer tight against the head. Mount the bolt in a drill and file it as it turns.

Man i am sure glad i don't have to mess with all that washer stuff to get a good seal with no blow by. hasn't CVA cured this problem yet in the factory?

builder459
I don't complain about them any more at least they don't blow up any more.

this is nice being able to adjust things. CVA is working on a user friendly head space adjustment built into the rifles. For now those, being able to using the firing pin bushing or just adding some shims into the BP is a very simple and easy task.

Didnt find a washer but semisanes way sounds like the next best bet.

Ace Hardware has a great assortment of thin stainless steel washers for #4, 6, 8 & 10 machine bolts.

i looked at the washers today and the store only had #4 washers, much to big

I'll have to try home depot or lowes.

Been doing this one for years...

#2 or 3 washer is exactly what i need. Im sure home depot or lowes will have it. Stores in our town suck lol.

A fella from Montana contacted me about his Apex QRBP. He suffered excess blow by, and had no way to reduce headspace by unscrewing the firing pin bushing. He say the Apex is not made the same way as the V2, and that one cannot reduce headspace by unscrewing the firing pin bushing. He also wanted the plug to be reliable with BH. He wanted the plug to fit CCIm primer. He mailed me his plug, and i fixed him up, and mailed it back to him. He called and said our plan worked. How we were able to arrive at a workable headspace long distance, i have no idea, unless it was because he lives a good clean life. His Apex plug and the 3/8" bolt installed into the primer pocket...................