Equipment & Gear > Guns and Ammo
338 375 ruger build
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yorketransport:

--- Quote from: jasnt on May 17, 2018, 05:36:17 PM ---Could you explain how you hand ream?  I’m picturing using a T handle from a tap set.

I need to get my lathe back together. It wouldn’t handle chambering a barrel I don’t think but would handle a custom die set or break.

--- End quote ---

That's exactly how I do it, with a T handle. I just lock the barrel vertically in a bench vise with a set of barrel blocks and go for it. I have to stand on a step stool (because I'm short :rolleyes:) so that I can apply even downward pressure while turning the T handle. I treat a reamer like a chainsaw; don't force it, just let the blades do their job while you give a little gentle pressure.  Go slow, use plenty of cutting oil, clean the chips often and measure often. On a Savage barrel I ream the chamber until a Go-gauge projects .125-.130".

If you started with something like a 338 RCM it would be really easy. You'd be cutting for a while but the reamer would naturally center itself in the chamber since the shoulder dimensions are identical. All you're doing is lengthening the chamber. Rechambering a 338 Win Mag barrel is faster since you're not removing as much material, but you have to be more careful to keep the reamer centered in the chamber until the pilot reaches the bore.

Once the chamber is cut, I'll lengthen the throat using a PTG Uni-throater to match the OAL that I want to use. I used a different freebore on the rifles since they needed to feed from a magazine. On my 338/375 Ruger Striker pistol I use a longer freebore since it's a single shot. Using the throating tool is great practice for hand reaming a chamber since it helps you get a feel for how quickly you remove material.
jasnt:
We’ll barrel is ordered. Went with 30” McGowen 1:9 straight taper howage in 338 RCM
yorketransport:

--- Quote from: jasnt on June 04, 2018, 02:13:15 PM ---We’ll barrel is ordered. Went with 30” McGowen 1:9 straight taper howage in 338 RCM

--- End quote ---

Excellent! Let the waiting begin!
jasnt:

--- Quote from: yorketransport on June 04, 2018, 08:28:28 PM ---
--- Quote from: jasnt on June 04, 2018, 02:13:15 PM ---We’ll barrel is ordered. Went with 30” McGowen 1:9 straight taper howage in 338 RCM

--- End quote ---

Excellent! Let the waiting begin!

--- End quote ---
i hate the wait! 
mountainman:

--- Quote from: yorketransport on June 04, 2018, 08:28:28 PM ---
--- Quote from: jasnt on June 04, 2018, 02:13:15 PM ---We’ll barrel is ordered. Went with 30” McGowen 1:9 straight taper howage in 338 RCM

--- End quote ---

Excellent! Let the waiting begin!

--- End quote ---
Like waiting for Christmas!
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