After having read a lot of discussion about sticky cases and split cases in old post,i took my time to weigh all my cartridges in 460 and i found big difference between different lots!
All are Hornady 200gr SST/FTT:
Lot n° xxxx (3x20 ctg): total weigh from 394,2978 gr to 395,8411 gr.
I shot 7 ammo of one of this box,in my SW 5", 3 days ago. All stick to the chambers and one split (along the case); All the pimers were flats after shot.
Lot n° yyyy (20 ctg): total weigh from 393,526gr to 393,6805gr!!!!(i don't shot this one)
Well it means around 2,31gr between 2 lots of ammunition!!???
So can it explain my over pressure sign with this lot n° xxxx ?
I can think there is so much # BETWEEN the bullets or cases weigh?
Should i try to shoot with the yyy lot, to see any #?...before send my gun to the importer?
Tx for you answers.
R.
PS: see my post in the "SW revolver: from 1980 to the present"

You should contact the Manufacturer about that, I been doing a little hand-loading and here's what I came up with so far.

Hope you figure that out Patvince I'll be looking to see how you made out.

I loaded the lowest charge recommended by Hornady for the 200 gn flex tip 460 Mag with 3 different powders using new Starline cases and Winchester WLR primers and all seemed to shoot fine but I did notice I had flattened primers in all of them. I need to call Hornady but haven't yet, they might recommend I back off more, but till then I stopped.

There were no other signs of high pressure, Except for the the Wow's I got when I fired it.

I loaded as followed :

Blue Dot @ 28 Grains, 31.9 grains

Win 296 @ 43.3 Grains, 46 Grains, 48.7 Grains

H 110 @ 44.6 Grains

I used S & W 460 XVR 8 3/8"

I have some 360 Gn LBT WNFT GC Lead I'm gonna try next but I need primers first.