Home Forums Hunting & Shooting Custom Rifles & Wildcats 9.3x62 reamers

I paint clear/concise pictures,to folks who actually fhuqking shoot. I don't fret the onlookers. Hint.............

338-06 reamer print I found shows .088 freebore, .149 leade. That about makes sense. Probably time to put some dummies together and ship to Manson.

Make sure the diameter of the freebore is quite close to bullet diameter.

I was thinking to go .001 over bullet diameter.

.0005

10-4.

Current plan is .125 freebore at .0005-.0008 over bullet diameter, then a 1.5 degree throat angle. This basically duplicates the Whelen reamer I came up with. Have shot most of the factory ammo I could get hold of out of that chamber. It's warm, near or at book max, but not over. Various 250gr bullets jam at between 3.34 and 3.35 coal, 225 accubonds jam at 3.45 or so.

On this 9.3 reamer considering adding with .010 more freebore just to make up for the slight increase in case capacity over the Whelen. Thoughts?

Sounds good to me TX if you have the magazine space.

Thanks Beretzs. Should be fine on the magazine box. 3.4 as it sits and 3.6 if I knock the spacer out and shorten the bolt stop and ejector. It will be several months but I'll report back. In the end a $225 reamer is a drop in the bucket compared to a rifle build.

I Think you folks are doing everything the hard way. Take this advice from an old basement gunsmith. Just get yourself a good SAMI reamer from any good maker.
.Have the maker remove all of the throat. Then have him sell you a throater with ever angle you desire, and make certain that it is no more than the minimum diameter over bore size you desire. Cut your chamber and set your headspace. Then cut your deapth of throat to a sample round with your throater. I do this with my 6.5-06 reamer and my 6,5x55 chamberings jobs.. I have both a 1.5 degree and a 5 degree throater for doing these calibers.

Tex,

I have a similar reamer from JGS, its .135 free-bore with a 1 1/2-degree lead. The free-bore diameter is .3665, the neck diameter is .393. I wanted to get rid of the tapered neck. I haven't chambered it yet, what is your CBTO? I appreciate the help.

I would tell you but while I have the reamer in hand, I am still waiting for Benchmark to give me the barrel. The reamer Manson made me has .135 freebore at .3668 then a 1 1/2 degree lead. Neck is tapered .392 at the shoulder to .391 at the case mouth. Sounds pretty similar to the JGS. Hopefully will have the barrel in hand in the next month or so.

But if you get yours chambered first, I'd love to hear about it.

I have everything on hand, I’m trying to figure out who to send it to. It’s a M70 extreme weather 270, I have a Brux #4 with 1-12 twist and a PTG obendorf bdl. For now it will stay in the B&C until I figure out an aftermarket stock. My plan is to finish it with a 22” barrel, I think it will be a dandy.

For clarification the bottom metal isn’t a bdl, it is specific to the post 64 action. I get in the habit from my Remington days. The only thing I don’t have nailed down is the scope bases. Is it worth it to have them opened up to #8-40? Badger makes a 1 piece with a recoil lug #6-48 but, it’s 20 moa.