300blk blast chamber size (I searched)

[V8Astro]

Hello again. After my successful 300blk can I made for my AR15 I want to make another for my Ruger bolt gun. This time around I think I'm going to "cheat" and use a pre-made tube and cups. From the options that are out there I see the first "cup" is very close to the muzzle. I could make a simple spacer but would lose a baffle and possibly increase FRP. I'm happy with the performance of my AR can but it does have a loud FRP but little back-gassing.

If my next can is dedicated to my bolt gun how close can the first baffle reasonably be to the muzzle? Or maybe it's better to ask how little blast chamber can I use without ill effects?

[crazyelece]

It's just a guess as I have no experience in 300 blk, BUT as close to the muzzle as possible with a little space for cushion.

With a bolt gun you don't have to worry about back pressure so a minimal size blast chamber would help significantly with frp.

[smustian]

Put the tip of the first baffle 1/8 - 1/4" off the muzzle. With no muzzle device you should be able to get an extra baffle in the tube.

[T-Rex]

What caliber?
Subs or supers?
What length can are you hoping to use? Diameter?
Is this can dedicated to this gun,caliber,purpose?

[V8Astro]

What caliber?
Subs or supers?
What length can are you hoping to use? Diameter?
Is this can dedicated to this gun,caliber,purpose?

300blk. 9" long x 1.375 ID. Subs only. Direct thread to a Ruger American bolt gun. Purpose is to toss 208gr Horndady ELDs as quietly and accurately as possible up to 100 yds