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I dont need a maths lesson thanks. The correction would have been fine. Had the wrong two calibres in mind. And we should call it cross sectional area, not frontal. Frontal would incorporate the projectile nose shape.

475 has 11% more cross sectional area than .458

The energy doesnt stay the same when you increase bore size though, if thats what you meant, it increases. A basic rule of thumb is the increase in energy as you move up calibre is equal to half the increase in bore surface area. So a 475 vs a 458 with the same case capacity, 11% surface area...

Its 4200 Australian , around 2500USD. But again not so much a power/dollars ratio project anyway, more a project that personally interested him

He makes them for fun a lot of the time. he has done everything from 375 to 600O.K in safari grade, 577 light nitros on Martini henrys, bolt and levers in 50AE, 500alaskan, 500SW and Automax, also owns the only two 577 Rewa and 495-Square reamers I have ever heard of in use( I mean seriously...

Ive seen the velocity reports, 2300-2350fps 500 grain jacketed. Thats 458 lott power. Id say removing the taper and necking up add a bit more powder capacity than expected and also the 11% larger bore area in 470 over the 458 with the same bullet weight moves it a bit faster as well. I have...

Thats a great looking gun Bob. Can I ask what the barrel length was, also what COAL you were loading to?

Hi mate, thanks a heap, will send a PM now. Im very interested. Is Kieth still operating these days?

Thanks, I thought the P14 housed the 30-06 though, isnt it even smaller rim than the 444?

Hi Gents, Ive had a few custom projects done in the past but probably not for 20 years. That generation of master gunsmith is getting harder to find in Australia. Any aussies here know of a gunsmith who can pull on the project above? I tried Bob Devries but he isnt interested. All my other...

Thanks for all the replies fellas. One question which takes the bias or hyperbole or anecdote out of the equation is do the 577 and 600 nitro actually kill faster? For all you fellas shooting these buff and hippos, did you notice the animal drops faster with a 577 nitro than say a 500 jeff or...

fellas I have often wondered if the two biggest elephant guns of the smokeless era offeered anything or whether they were again more marketing for the safari crowd who A wanted the biggest and B, weere used to calibres so large like 10, 8 and 4 bores they felt a 577 and 600 in a smokeless guise...

Wondered if anyone using these big bangers has ever taken medium game with them? Im thinking while not exactly the calibre you select for an antelope hunt if you did find yourself with an opportunistic shot they are going to do the job. I was thinking meat damage may also be less than a 300 win...

Hi gents I've always been intrigued by the classic bolt action safari guns like the 505 Gibbs, 425wr, 416 Rigby and 500 Jeff. I always wondered if the extra couple hundred fps provided any advantages over double rifle speeds. Were the inventors of these bolt guns tapping into more useful range...

Hi gents, new to the forums, never tried woodleighs but like the lower velocity expansion estimates for some of the bullets. Have only owned a 375 previously. Looking to get a 404 and run original ballistic velocities of 2125fps with the 400 grain. Woodleigh suggests 1900fps at min expansion...