Gunsmithing .300 Whisper Chamber Print?

[Wannashootit]

Can't seem to locate a print online anywhere- I thought it was CIP but I don't see it there.
Customer sent a Savage barrel in .300 Whisper to be rechambered to Blackout, need to figure out how easily this cleans up.
If you've been down this road, comments welcome.

 

[Steel head]

Years of searching for obscure porn has heightened my internet search skills obviously.

I know the whisper dude kept his designs pretty close to chest but AAC swiped it anyways

 

[iceng]

JD Jones is an idiot. He had the chance years ago to make the 300 whisper something big. He wouldnt let me chamber a barrel with his specs. It (was) proprietary to him. So I got a reamer made, and did it anyway. Didn't make many, dies were a pain to get.

Ended up jumping on 300BO soon as I had the chance 10ish years ago. I made a stack of conversion barrels for 7615 pump rifles in Australia.

It's not hard to rechamber. Screw the barrel in an extra 40 thou / 1mm, chamber and headspace. Good to go (from memory, triple check the print above, but basically one barrel turn will do it.)

 

[Wannashootit]

Thanks, I'll check this out.
If I deepening .04 or so, I'd need to face the breech that amount (presumably) to get the .125 or so case head protrusion.

 

[cas6969]

Just curious if it's really an SSK .300 Whisper marked gun?

I've owned a few, stuff marked 300 Blackout, 300 Whisper, 300/221, 30/221, 300-221 and .300 Fireball and one with no caliber at all. Only ran into one of them that cared one way or another what I put in it. The .300 Fireball did have IIRC a short throat and pressures got up quick. but everything chambered and fired fine. The only fussy one was a Savage bolt oddly enough. Non factory barrel that I think the chamber was a little long, too much headspace. My (lord knows what spec) handloads worked fine, but factory Rem 300 BO would only fire about 75% of the time.

 

[Wannashootit]

^^^
It is, not a factory barrel- it's a 12" barrel off an SBR (I think- but could be a pistol, I'll ask him).
They just came out with a PCS (pistol chassis system) with an MDT chassis that looks pretty cool.

 

[cas6969]

Interesting. I thought Savage had learned their lesson and given up on them. They had all sorts of issues with the original one, extraction/ejection wise. Unless they finally figured it all out. There were some aftermarket tweaks than made it better, but not 100%.