What diameters are your Ruger .327 cylinder throats?

[TTv2]

A reloading channel I frequent recently started doing a series on loading for .327 and .32 revolvers in general and has an SP101 with cylinder throats coming in big. I'm hoping that this is only an issue with the SP101, but IDK, so I figured I would ask owners of any Ruger .327 chambered revolvers, what diameters have you got on your revolver(s)?

An SP101 in .327 is at the top of my list and I'm close to buying one. I would hate to an SP101 with large throats over a Single Seven or GP100 with regular throats.

While the focus here is on Ruger's, those that have other .327 revolvers, like Charter, Taurus, etc. If you've measured your cylinder throats, I'd like to hear what size they are too just to see if larger throats is standard for .327 revolvers.

 

[ThomasT]

My bud and I both bought Ruger SP-101s when they first came out with 4" barrels in 32 mag. That was over 15 years ago. Both of those guns had .309 throats. I bought a .3125 reamer and reamed them out. What a difference that made in accuracy. Ross Seyfried wrote an article on the Ruger Single Six Bisley he had many years ago and stated it had .309 throats also.

I reload for the 32 long/32 mag rounds and my jacketed bullets all seem to be in the .312 range. I size my cast bullets .314 because my S&W guns have .313 to .314 throats and all I shoot in those is lead bullets.

 

[LOLBELL]

My Single Sixes and Blackhawks all have 314 throats and shoot 313 lead bullets very well. I have not checked the SP101 or GP100 throats but they shoot 313 bullet well also so I believe those throats are 313 or bigger

 

[TTv2]

My bud and I both bought Ruger SP-101s when they first came out with 4" barrels in 32 mag. That was over 15 years ago. Both of those guns had .309 throats. I bought a .3125 reamer and reamed them out. What a difference that made in accuracy. Ross Seyfried wrote an article on the Ruger Single Six Bisley he had many years ago and stated it had .309 throats also.

I reload for the 32 long/32 mag rounds and my jacketed bullets all seem to be in the .312 range. I size my cast bullets .314 because my S&W guns have .313 to .314 throats and all I shoot in those is lead bullets.

I think casting at .314 or a bit larger is the right way to go, if needed you can size down.

After watching the video on the .313 SP101 throats, I was disheartened. I have little interest in casting, but I do want to shoot lead primarily for plinking and jacketed bullets for business. .312 throats would have worked fine in that regards because most jacketed .32 bullets are .311-.312 and their are factory lead bullets you can get at .313.

IDK, maybe for the .32 I will just have to get into casting.

BTW, my .32 H&R Magnum Heritage Rough Rider has .312" throats and it groups great.

 

[somethingbenign]

Which reloading channel? I'm looking to really kick off my reloading when I get my 327... eventually

 

[Domino300]

SP101- .311
LCR- .314
S-7 .314
S-7 .313
GP100 .316

 

[ThomasT]

TTv2 in the Ross Seyfreid article I mentioned he stated he got good accuracy with the undersized throats firing jacketed bullets. He stated he got excellent accuracy firing Speer plinkers that are .308 and his bore was .312. So the best you can do is just load up and try it. I use the drop test where you drop a bullet in the cylinder and see if it stops at the throat or falls through and hits the floor. If it stops it should be good to go. If it drops through look for another bullet.

I mostly just shoot lead from my guns including the 32 mag. I keep velocities around 1000fps and no leading with my water hardened bullets. I do sometimes shoot faster jacketed loads but not that much. Thats why I never had any interest in the 327 round. If I want that much blast I will just go up to a 357 round.

I really like my 32 caliber guns. My h Holy Grail gun was aS&W model 632 and I finally found one I could afford. Mine is the 4" barrel with adjustable sights. After I got it I found I still prefer my two Ruger Single Sixes with 5.5" barrels and adjustable sights. I have four 32 mags and four 32 S&W long revolvers along with a Manhurin 32 ACP made in 1957 and a Marlin 32 mag rifle. And I am always ready to buy another if I find a deal one on.

 

[RealGun]

.312 is the spec according to Hornady 9th Edition, and that is what I want my throats and bore to be as well as any jacketed bullets. I want my lead bullets at .313. I wouldn't expect +-.001 to have much effect, although perhaps noticeable in any barrel leading. I have shot lead at full power and not experienced any leading in either the S7 or the SP101. The main issue with using bullets really made for 32-20 is that the case length may need to be trimmed to control the COL on some of them in the Ruger revolvers, currently either 1.182 or 1.189, each +-.003..

I no longer have the gun, but for the 4" SP101 I had to spend over $100 for a chamber reamer to get uniform ejection. The throats didn't seem to present any problem. After several projects I am now hesitant on any new Rugers, which seem to inevitably go back for repair or replacement before being the guns they should be at that price. I kept my Single Seven, which has been repaired or enhanced three times, and I use a first generation 3" SP101 in 327 as an EDC in warm weather, wearing it at the moment. I load subsonic for carry (no hearing protection) using a load from a Brian Pearce article on loading this cartridge.

 

[TTv2]

Thanks for the replies everyone. If you would be so kind, those that have a Ruger LCR or LCRx .22 Long Rifle, what size are the throats?