Gunsmithing 300wsm barrel length 20' nonsense?

[Schleifalot]

Q: Is a 20 inch barrel in 300wsm a workable option, or only a fireball maker?

I own a 308 win custom rifle with a 20' barrel. Now I am considering whether or not to ream a 300 wsm chamber in this rifle.
Can I expect usable v0, or do I get just a loud 308.

 

[MJB13SRT8]

It will still be faster than a 308 but it will be a loud flame thrower and waisted powder if you are using slow burning magnum powders. Just my two cents if you are going to stay at 20" then go 30-06 it will be faster than a 308 and less waisted FPS and powder and you can keep the bolt face the same which you can't do with going to the 300 wsm.

Montrose

 

[TonyTheTiger]

I own a 308 win custom rifle with a 20' barrel.

Damn. How do you transport it? What kind of velocities are you getting?

 

[generalzip]

I recently went through this debacle. The fact that proof only makes pre-fits for the TL3 in 24" settled this for me. I've also come to the conclusion it's waster powder and barrel life. For mags, stick with 24"+. For medium sized cases you can get away with 20". The 300wsm in a short action will save you like 1-1.5" just in action length alone and some weight so make sure you factor that in.

On a side note, the 300 wsm seems to be an ideal versatile hunting round with flat shooting 15 grains bullets for deer and bigger 200-210 grain bullets for large game like elk and bear. Get a can or a good brake with ear protection and you should be good to go.

 

[Geno C.]

20” is very portable. I have one. H4350 under 210vlds

 

[MOUNTIC]

My sweet spot for the WSM is 23 inches. Shoot the factory Hornady 200gr eldx right at 2800fps. Can't complain about that for a 23" gun with factory ammo. Haven't hand loaded for this one yet. Probably won't as I load for too much other stuff right now.