Hi was wondering how many of you ream the cylinders of your 460 to better shoot lead & jacketed Bullets? I tried to push a .452 plated bullet thru my cambers with a dial rod but I soon realized that I would have to use a hammer to get them to fall thru.from what I have seen online that indicates a tight cylinder throat

I have never gotten plated bullets to shoot decent groups out of a revolver. Besides that, you can't count on a bullet to be a measuring tool. You need a gauge pin set or hole gauge and micrometer to actually measure the hole. The final word on what works is groups on the target. Load some bullets and shoot for groups. Then you will know if you need to change anything or not.

Will lead Bullet performance be skewed if they are gas checked vs. none?

But even if the groups are ok wouldn't the throats being reamed lessen the pressures generated and reduce recoil?

If you want to do it exactly right slug the bore, then makes sure the throats are exactly the same or slightly larger. I wouldn't trust a plated bullet diameter unless I measured a bunch of them, even jacket bullets can have some small variation.

You could also slug the throats then measure the throats.

If the bore and throat is the same and the bullet slightly large, the bullet will swedge down very quickly with no concern, unless you are right at top pressures.

This phenomena of large bullets working in a small bore without pressure spikes is documented in P.O. Ackley 1966 "Handbook for Shooters and Reloaders Vol 2" chapter 7
"additional pressure tests":
"..30 cal barrel pressure barrel was fitted to the test gun, but the
neck and throat was enlarged to accept the 8mm bullet, with the bore remaining the standard 30 caliber. A Remington factory 30-06 cartridge with the 150 gr bullet had been tested and previously gave 57,300 psi, for a velocity of 3030 fps. The the bullets were pulled from two more Remington 150 grain cartridges and were replaced with 8mm 150 grain
bullets. To everyone's surprise, although the velocity was rather erratic, these loads averaged 2901
fps, with a pressure of 40,700 psi."

Interesting that in this case documented by a renown gun expert and tester, the pressure actually went down when firing a oversized bullet.

He even fired 35 Whelen loads with 358 lead bullets through a 308 bore using a rifle chambered to 35 Whelen with a 308 bore, with little pressure increase. Thats .050 over sized. Having ran lots of cast bullets through a bullet sizer I can tell you it doesn't take much force to swedge down a bullet and the arm on my sizer is way shorter than those on any of my reloading presses.

This isn't to mean I recommend oversized bullets. But, the horrendous results everyone expects are not what really happens. Things like poor head space, over loads, under sized cases in large chambers are far more of a danger.

I have not had any accuracy issue shooting .452 jacket bullets from my 460s with the condition they are operated within the the manufactures velocity rating. I have experienced some issue
with .451 jacketed bullets in regards to accuracy.

I have done some testing with lead and found if you plan on shooting at 460 velocity and pressure gas checks and proper sizing prove to be very important.

I have no experience with trying to use plated bullets but would urge caution as not to exceed manufacture velocity cieling based on jacketed bullet testing.

Several 10.5" guns have been reported to have tight throats, which means these the guys are simply adjusting their loading (slightly reduced) and have not reported any decrease in accuracy or performance.
I have one with tight throats and one with normal size.
I have not seen them in any other barrel length as measured in my other 20 something 460s.

good luck and be safe
Ruggy

Thanks for the advice. I don't plan on using plated bullets in my 460. Although the Lee book of reloading mentions shooting 250xtp with 2400 that I would like to try. I currently run 240 & 300 xtp mags over Imr 4227. I have recent been shooting matts 305 gr gc Bullets and was trying to decide on Penns 340 gr w/o gas. That's what got me into surfing the internet and questioning my cylinder.

I would suggest you use a reloading manual where the authors actual does their own ballistic testing, Lee just copies information.

Check the Hornady manual and they list the 250 XTP bullets for 1600 fps, I personal had jacket separations which lead me to discover they don't recommend or supply data for there use in 460.

I typically use 4227 over the 300 XTP MAG, but perfer 110/296 with the 240 XTP MAG.

I also use the 225 FTX but only load the to 1900 fps - Hornady's max listed.

I just got a batch of 340WFN and 345LFN from Beartooth to do a big load development study.

Going to test A9, 2400, Enforcer, N110, H110, 4227, N105,and Lil'Gun
Should be interesting.

Be safe and good luck
Ruggy

I was getting 6 inch groups at 200 M out of my 8-3/8 629 Classic DX 44 Mag with 300 gr. XTP and 18 gr. H4227. This load has a muzzle velocity of 1050 in my gun with mild recoil. I have shot 80 rounds in one day lots of times in silhouette matches and my hands never hurt during or after. There is plenty of room to step this load up if you want more velocity. I was staying just under supersonic to get good groups.

Hey Ruggy I would really like to hear the results of your testing. I haven't Considered Beartooth Bullets as a source. Especially with the 4227

Has anyone experienced this? When I first bought my 460 I purchased 2 boxes of 200 gr hornady ammo and 1 box of Federal Fusion. Now I can't remember which of the brands did this but after resizing the brass the primers literally crumbled and where burnt looking.

If you mean the anvils fell out of the spent primers , it is normal.

be safe
Ruggyh