Heavy Cast 450 Bushmaster - Subsonic

[MEHavey]

For the Search Engines....

 

[mcb]

How did it sound? Did you suppress it? I found with my 450 BM subsonic it would not cycle without the suppressor but would with the suppressor.

 

[MEHavey]

No suppression (which likely would have created enough back-pressure to cycle)

As you imagine sound was somewhat similar but noticeably less than a low/heavy trapdoor load --
-- far less muzzle blast as powder was burned completely with short order of bullet movement.
(LABRADAR'd)

 

[jmorris]

How did it sound? Did you suppress it? I found with my 450 BM subsonic it would not cycle without the suppressor but would with the suppressor.

Even with projectiles over 500gn?

 

[MEHavey]

Using the 517gr (#2) Paul Jones w/ fast N105/2.5" travel to burn out as in the OP, not even try to eject.
Using Slower Accurate#7 w/ 30:1 (548gr) (w/ same peak pressure but longer rise time of 5" to burn-out) started ejection half-way -- but not as accurate

 

[mcb]

Even with projectiles over 500gn?

I have only tried 405 gr bullets, with Tailboss and Tin Star.

 

[41 Mag]

I looked really hard at purchasing an original mold for that bullet just the other day for the 45-70. WOW you got it working...

 

[MEHavey]

PJ's been a steady performer for me in the heavy BPCR game for a loooong time.
https://castboolits.gunloads.com/sh...g-primers-in&p=4693801&viewfull=1#post4693801

`Sure wish he & his son were still able to make them.....*
https://castboolits.gunloads.com/showthread.php?205974-Update-on-Paul-Jones-no-new-mould-orders


* this might be interesting....
https://brooksmoulds.com/basepour.html

 

[jmorris]

I have only tried 405 gr bullets, with Tailboss and Tin Star.

I imaging you don’t have HS-7, it’s my favorite but HS-6 should function with 405’s.