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Gunsmithing 300WSM Chamber and Barrel Length

LongArm

LongArm

Problem Solver
Full Member
Minuteman
Apr 30, 2007
1,206
22
Corpus Christi, Texas
#1
-What is the best 300WSM chamber (factory, match...)?
-What is the best Varmint barrel length for longer range hunting?
-At what point does the length of the barrel become less rigid? I want it long enough to shoot 1000 accurately but short enough to make it rigid and easy to carry.

I was thinking about getting it cut at 24". I want to hand load the bullets but might need to buy factory at times. I will be shooting a 208 grain A-Max. I am not sure what the COAL will be. This will be on a savage/stevens 10 Shilen barrel.
 
#6
Re: 300WSM Chamber and Barrel Length

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Robert Gradous</div><div class="ubbcode-body">The one I use has .055 freebore at 1 degree 30 shoots 168 and 175 great. </div></div> So If you wanted to shoot 208's how would you set it up?
 
#7
Re: 300WSM Chamber and Barrel Length

What length action would be using would help answer that question. And saying that I might could come up with something. I also have one reamer set up with .150 free bore I think for 190 gr.If you would call dave kiff he could help much more than I can. If used in a long action they can be loaded long and then you could send dave 3 rounds seated were you won't them and he could cut the reamer with the correct freebore. I know the answer to your question is not here but I think you will find it in the answer from dave at PTG.
 
#8
Re: 300WSM Chamber and Barrel Length

Looking at the link to Richards page I have a question about that deep crown on that barrel. Mainly does it work and is there any negative issues compared to other crowns. Someone tell me more about it, it is interesting.
 
#10
Re: 300WSM Chamber and Barrel Length

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Robert Gradous</div><div class="ubbcode-body">What length action would be using would help answer that question. And saying that I might could come up with something. I also have one reamer set up with .150 free bore I think for 190 gr.If you would call dave kiff he could help much more than I can. If used in a long action they can be loaded long and then you could send dave 3 rounds seated were you won't them and he could cut the reamer with the correct freebore. I know the answer to your question is not here but I think you will find it in the answer from dave at PTG. </div></div>
I am building two, one short (for my dad) and one long (for me.
 
#12
Re: 300WSM Chamber and Barrel Length

Mine has a match chamber and a Rock 26" barrel built on a LA by Chris at LongShot. If you go SA, make sure you set it up for an extended mag box. I shoot 175 SMK @ 3050 fps.
 
#14
Re: 300WSM Chamber and Barrel Length

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: wildcats</div><div class="ubbcode-body">i've got a Dave Kiff 300 wsm rogue reamer you can use.33 degree 334 nk.
Clay Spencer built mine with a 26` barrel. </div></div>

what is the difference between, rogue reamer and a match chamber?
 
#15
Re: 300WSM Chamber and Barrel Length

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: LongArm</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: wildcats</div><div class="ubbcode-body">i've got a Dave Kiff 300 wsm rogue reamer you can use.33 degree 334 nk.
Clay Spencer built mine with a 26` barrel. </div></div>

what is the difference between, rogue reamer and a match chamber?
</div></div> Dave just called it the 300WSM Rogue.33 deg.
the only difference would be the shoulder angle,tight nk chamber and the free bore.
 
#18
Re: 300WSM Chamber and Barrel Length

The opening in the bottom of the action needs to be made a little longer to accomidate a Wyatts extended mag box. They measure about 3.090" in length. The opening in a factory Remington SA is about .100" shorter if I recall correctly, don't have one here to measure.

Sort of depends on how long the throat is on your gun but with vld type bullets its pretty easy to run out of mag box length with the longer heavy bullets if your is longer.
 
#21
Re: 300WSM Chamber and Barrel Length

The problem with the WSW and a long bullet is, it really needs to be in a long action unless your ok with it being a single shot. If you load the 208 in the case with the base of the bullet at the shoulder, you cant get it in a short action box. At that point if your wanting to shoot heavier bullets than a 190, in my opinion I'd go with a long action cartridge. 300 win, 300wby, 300 rum, etc. Hope this helps. TM
 
#22
Re: 300WSM Chamber and Barrel Length

LongArm - don't know Savages real well but if you talk through this with whoever is going to chamber the barrel you should be able to arrive at a conclusion on what the length of the loaded round will be and if it will fit in your length of mag.

If a reamer is used with the "standard" amount of freebore (.055 - .090), usually the typical weight bullets will fit into the mag box without an issue. The problem starts to show up when you shoot heavier vld style bullets. They either seat into the case robbing powder capacity or they seat out further filling the mag box.

Sometimes a reamer with a little longer freebore is used so that the heavier vld style bullets can be seated out further so as to maximize case capacity. This can be really usefull for long range shooters but it usually requires a longer length mag box unless you want to single load.

It all depends on what reamer is used to cut the chamber and your smith should know the answer to this regarding his reamer. FWIW, I use BDL style bottom metal on my rifles because it is a lighter setup. DBM is usually heavier and more expensive unless you want the ability to reload quickly, then it is the way to go.
 
#23
Re: 300WSM Chamber and Barrel Length

well I am building one rifle for my father in a short action and one action for me in a long action. My father doesn't reload so he will more than likely shoot what I give him or factory loads.


So the first(S/A)will be factory match chamber and the long action might be a different chamber.
 
#25
Re: 300WSM Chamber and Barrel Length

If they offer different freebore options they should be able to answer the COAL length question pretty quickly. Ask and see what they say.
 
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