Winchester 1907 WSL another project

[pmatuk]

have a 1910 /401 barrel that was pitted with little rifiling,Ground a pilot on to a cobal drill bit sharpened it and soldered on a long shank oal is now 22 inches .
then proceeded to bore out barrel for a liner .Have a take off barrel from a .308 turn down barrel to make liner ,making the oal to also 22 including shank for chambering( barrel liner has brite bore don't know why it looks dark in pic)
Have a tight fit and using green locktite installed liner and trimmed off the ends and now waiting for reamer from Big horn to arrive in a few weeks

 

[NorthCoastBigBore]

Can't wait to see the result!

 

[pmatuk]

It will be in 300 black out with the over all length at 1.9 " .Think I will be able to run a 180 gr to 1500-1600fps at aprox 40 000 psi with in the rifles comfort zone
my ever helpful assistant

 

[NorthCoastBigBore]

Ha! Yup I have a shop cat too.

You know these rifles inside and out, watching this one unfold will be interesting. I still have to fix the stock on mine using your tips, just been swamped and behind in everything.

 

[saltednutz]

---

 

[pmatuk]

Dies and brass from budget arrived today and was finishing up the recoil buffer assembly .Not the same on a 1910 as the 1907 so had a bit of trimming and fabbed up a pocket and cap.Also didn't save a reamer holder so made a set of floating style for 7/16 and 1/2"

 

[pmatuk]

Well I receiver the reamer .Chambered up the barrel and the fun begins .First loads do not cycle action imr 4227 and 180gr round hornady 3075 bullet .Shave weight till action will cycle .Now the problem is it is erratic ,won't cycle on one to two shots and then it does one case will be proper and then the shoulder moves forward .

still using the same bullet try lil gun powder and similar results .try 4198 won't cycle.

conclusion is that the bottle neck case in a delayed blow back might not be the way to go .

Just around a 100 rounds so far with 3 powders and varring charges and even a 150 gr bullet no success so far also shaved weight and replaced weight with stick on wheel weights still missing something .

Might try using a 110 carbine bullet next ,(made a 1907 a few years ago in 30 carbine and works proper ) .Will try some more later ,will ponder for abit .

 

[double gun]

This is really neat, thanks for sharing Peter.

 

[pmatuk]

Will shave a bit more off the weight and try again and if I cant figure it out it will become a 30 carbine and will use the 300blk out on a baby martini ....and build some rimless xtractors fo them ,always another way to skin her LOL(110 bullet no worky either)

 

[hayday]

Well I receiver the reamer .Chambered up the barrel and the fun begins .First loads do not cycle action imr 4227 and 180gr round hornady 3075 bullet .Shave weight till action will cycle .Now the problem is it is erratic ,won't cycle on one to two shots and then it does one case will be proper and then the shoulder moves forward .

still using the same bullet try lil gun powder and similar results .try 4198 won't cycle.

conclusion is that the bottle neck case in a delayed blow back might not be the way to go .

Just around a 100 rounds so far with 3 powders and varring charges and even a 150 gr bullet no success so far also shaved weight and replaced weight with stick on wheel weights still missing something .

Might try using a 110 carbine bullet next ,(made a 1907 a few years ago in 30 carbine and works proper ) .Will try some more later ,will ponder for abit .

I wouldn't take any more mass out of the under barrel weight. The problem with inconsistent pressure and inconsistent cycling seems to relate to a headspacing problem. You may have gone a bit too deep with your reamer and you aren't getting the same level of pressure from one shot to the next because the cases aren't consistently headspacing on the shoulder.

I'd start with .357 mag brass and turn down the bases to a semi-rimmed spec (like 38 Super) - so they feed through your magazine but still headspace on the rim (as the 1907 was intended to). I'd resize these semi rimmed 357 mag cases in your 300 BLKOUT dies BUT keep loosening the sizing dies it until you produce rounds which headspace on both the semi-rim and the case shoulder.

I'd go with a 125 grain bullet and a fairly fast powder.

Great project! Good luck

 

[pmatuk]

problem solved LOL .Loaded it to 30carbine specs with a 110 gr sp 12.5 gr 2400 ,cycles and the cases ejected look good .I originally wanted a 160 to 180 gr bullet but a 110 that works is also good and it basically duplicates the 30 carbine but in a bottle neck

even though I did not get the heavy bullets to work I am still satisfied with the results and will still consider it a sucess

Will now tear it down and blue her up
Cheers Peter

 

[partsman]

I have a brand new barrel that i got when i bought my 1907, but old one is still good so will keep it for a spare.