This is a great board so far. Im going to take a hard look at heym and cz 505 Gibbs soon.

Now, Ive not shot anything more powerful than a 470 Nitro thus far, and the double was a Westley Richards with a hard english pad ie not a decelerator by a stretch-I wasnt too bothered.

What can I expect by way of compariso with the 505, 458 Lott and esp 585 Nyati/585 seies wildcats? I dont fear pain, its more the wait time for the barrel to fall and to resettle to bolt cycle and get abother round in the spout when I hunt-and with my luck, the PH rifle will jam....

If your rifle is built with a straight inline stock has the proper LOP a good recoil pad (F990) and a decent amount of weight (10.5 to 11.5 lbs) it shouldn't be too bad. Check out the recoil videos on my site. I'm shooting my 470 Mbogo which is a 500 grain bullet at 2500 fps.
Take good care,
Dave

If you really like pain try the Heym .600NE on for size. There is probably NO DGR ever designed WORSE for recoil than that!
The .458 Lott and 505 Gibbs are about the same level of felt recoil as far as I can tell when loaded hot. Maybe the Gibbs is a little worse. more like a .500NE in a light double.
When you get to 2400fps in the NYATI you had better have good technique. Better learn to clamp your teeth, lean into the gun and roll with the recoil. If your right handed watch the bolt handle and wrap the front of the trigger guard with foam. Don't ever take your head off the stock. The recoil pad needs to be pulled into your chest as centered as possible, not in the pocket of your shoulder, nor god forbid high up on your shoulder. It needs to be placed such that so that you can still get a death grip cheek weld. Don't let your hand hit the bolt handle, or you'll really regret it! Ask Jeffe! Its not that bad but a step up from the 505 Gibbs. A 470 NE is more like a .458 win mag. The NYATI will get your attention if your form is poor. Watch your teeth! Once you know how, none of them are tough to shoot EXCEPT THE HEYM!-Rob

Ask me about the 577 Gibbs in about two weeks or so. The barreled action is waiting for the reamers to arrive to finish up. I have about 140 rounds thru my 550 Gibbs Magnum as of this afternoon. You can find the results here.

Rich
DRSS
Knowledge not shared is knowledge lost...

I guess I miss read your post a bit. Personally I think once your up in the 90 ft lbs of recoil range your not going to notice another ten ft lbs. There will be lots of recoil and that is when rifle fit comes into play. Your recovery time will be down for a second shot once you get into the 585 Nyati range unless you have a heavy rifle and a muzzle break. If you keep your rifle to a practicle hunting weight I think you'll find the recoil excessive. I know why the guys are building bigger caliber rifles but when it comes down to it they aren't the most practicle but they are fun. Recoil is momentary but gravity is forever. ( Thanks Canuck) Try out some of the heavy kickers before you build one.
Take good care,
Dave

NyatiDr.

if you are within range and want to try out all three, the 505, the 550, and the 577; consider this an open invitation to drive/fly to Boise, Idaho, anytime after January 15th and test drive them all. Same for the rest of you out there...

Rich
DRSS
Knowledge not shared is knowledge lost...

Idaho

Thanks alot, if I didnt hate flying more than enything in life Id take you up on it-I still dont know how im going to get into a little twin or Cessna in Africa-maybe Amtrak goes to Idaho. It does seem a good idea to try out some heavies first, not many people into them where Im at. But glad Rob mentioned the Heym-now it looks like CZ my one option-but then again, I always wanted a 585 nyati..

NyatiDr

If 585 Nyati is your dream, I would scratch that and go for some of the better wildcats. Try the 585 AHR in one of American Hunting Rifles stocked big bores and you won't be sorry. The 585 AHR is Ed Plummer's project, the 600 OK is Rob's invent- case necked down. At 13 lbs, 750 grainers at 2300 fps are not that bad and it is easier to feed than the Nyati.

Hope you find that the right amount of recoil to give you that thrill your looking for

Dak

Stuart is building me a 500 Jeff right now....hopefully I'll have it mid-spring. I don't intend to load it above about 2250 with 535gr bullets....plenty I think and manageable in an 11# rifle...and it will still knock 'em down. I don't find my 470 or 450 too bad from the bench...but I wear a sissy pad. My 404 is a pussycat at 2300 fps...shoot it all day if needed. My 425WR with 410's at 2300 will get your attention in the 9+ pounder...but not painful.
And, trust me...I'm not a big fan of recoil.

Gary
DRSS
NRA Lifer
SCI
DSC

I too was once bitten by the 585 NYATI bug. My suggestion is lie down till that idea goes away. The 585 AHR is a far better alternative with more power assuming you can handle it. The .600Ok is even better. A .600Ok built by AHR will seem like a bargain once you have worked the bugs out of the NYATI assuming you can find someone who knows how. Been there done all of that. Your decision. This is like PRO Stock NHRA drag racing. It separates the men from the boys Quickly. Backyard mechanics and gunsmiths are really not alot of help.-Rob