300 Win Mag Match Chamber?

[Jayhawkhuntclub]

Can someone here educate me on what this chamber is and what it's purpose (over the standard Win Mag chamber) is.
Looking at building a 300 WM. Planning to shoot heavies primarily.
Thanks!

 

[Supersubes]

Match means different things to different people. More than likely the freebore will allow proper seating of heavy bullets, and have a longer overall length than the saami 3.4”.

 

[Jayhawkhuntclub]

Okay that's what I thought. I ran into a similar deal when with my 223 build (went with the 223 Rem match).
FYI, the company offering this chamber is Criterion. Sounds like the way to go for shooting heavies.

 

[Supersubes]

Thats pretty much the way you fix a winmag. Im sure if you asked they could tell you exactly what they had in mind for that chamber.

 

[Bandit320]

I have the Criterion 300 WM match barrel. I can seat the 225 ELDs to about 3.68” (or something close to that). Not sure about the specs of the chamber but man does it shoot.

 

[NukeMMC]

RW Snyder put a 300WM Match chamber in my Krieger. Shoots 208ELDMs pretty doggone well.

 

[Mach1pilot]

RW Snyder put a 300WM Match chamber in my Krieger. Shoots 208ELDMs pretty doggone well.

I have had one for 8 years now... Probably the best shooting rifle i have... Always .33 moa all day shooting berger 215's

 

[sierracharlie338]

The Mark 248 mod 1 chamber is another version of that used by the military. I had a WinMag chambered in it, and it was a hammer with 200 class bullets and above.

 

[Easy_E]

What twist rate are you using with the 200+ grain bullets ?

 

[NukeMMC]

What twist rate are you using with the 200+ grain bullets ?

Mine is a 1:10" 4-groove

 

[FredHammer]

Okay that's what I thought. I ran into a similar deal when with my 223 build (went with the 223 Rem match).
FYI, the company offering this chamber is Criterion. Sounds like the way to go for shooting heavies.

Criterion bolt gun barrels are fantastic inside and on the target. To get deep in the weeds on what makes a match chamber, it would be the reamer specs. Neck clearance, throat clearance, freebore, etc. However, and as mentioned already, and since the barrel is still a production barrel, it's most likely longer freebore. Doubt they would tighten the clearances.

 

[Mach1pilot]

'- Mullerworks 5R 1:10 modified M24 contour barrel chambered to .300 Winchester Magnum "Tactical Match"

I will regret not buying a second barrel when I had this made...

 

[Easy_E]

Mine is a 1:10" 4-groove

Thanks ! Getting ready to install a ten twist barrel this week and was second guessing my choice for heavier bullets.

 

[Kickin45]

What distances are y’all shooting those heavies?

 

[FredHammer]

What distances are y’all shooting those heavies?

A mile

 

[Maurygold]

1:10 proof bull barrel with 215 hybrids (the king of 30 cal bullets)

 

[FredHammer]

1:10 proof bull barrel with 215 hybrids (the king of 30 cal bullets)

So I've heard. Like unicorn tears tho!

 

[81STFACP]

Choose your poison. After chambering multiple barrels of mine with differenr reamers, I went back to SAAMI

 

[45-90]

A match finish reamer, can be almost anything but stantard spec...and may not be what you want for your shooting application, of a certain cartridge,.. such as too long of a throat, or super short throat, versus neck diameters for certain brass or neck turning all your brass. I belive SAAMI standard is best for most applications, then I add a throating reamer to get the cartridge a longer COAL, everything flows smoothly as dies tend to fit, brass chambers freely, and it's plenty accurate...no extra screwing around needed.

 

[Maurygold]

So I've heard. Like unicorn tears tho!

In stock right now, and they're not that hard to find as of the last few months.

Berger 30cal 215gr Match Hybrid Target Bullet (100pk) 30429

Berger 30cal 215gr Match Hybrid Target 30429 for sale! Call (570) 368-3920

www.eurooptic.com

 

[FredHammer]

In stock right now, and they're not that hard to find as of the last few months.

Berger 30cal 215gr Match Hybrid Target Bullet (100pk) 30429

Berger 30cal 215gr Match Hybrid Target 30429 for sale! Call (570) 368-3920

www.eurooptic.com

That's great news. I stocked up on 200.20X during the 215gr unobtanium period.