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Hello, Anyone out there with brass or forming dies for 400/360 Rigby? I have some Bertram brass and will anneal it as their cases are brittle and will probably order case forming dies and form brass from 9.3x74R. If sure would be nice if some one out there had a pile or brass or dies they...

I was wondering, is there a general rule or thoughts on bore diameter vs bullet diameter for double rifles? Seems like you might like to limit barrel distortion a keep your barrels together longer? I have an "I" bore 8x75R double rifle that slugs to .306/.316" with a 1:9.5" twist rate. I am...

Does anyone has info on shorter bullets for 458 win mag to minimize compression of powder? Does anyone still make a tungsten core bullet or high density bullet to squeeze a little more powder space for the 458 win mag? Rick

I have a 458 Win double rifle that regulates best at: 500 grain bullets/2100 fps. It is striking how the groups shrink as you approach 500 gr/2100fps. If I was to develop loads for other (480, 465, 450 and 400 grain) bullets - would it be best to plan for 2100 fps? Rick Hill

To my new found shooting friends: So, I looked for a laser bore sight to help mounting a scope on my 404 Jeffery (not really) and they don't exist. BUT you can make one from 404 Jeffery brass or other big boomer brass and a 308 laser bore sight and you are good to go. Just measure the residual...

I understand that total recoil is the sum of the work needed to accelerate a bullet say 400 Gr to 2400 fps and also the "jet" effect of the gases. So a 416 Remington Magnum burns less powder than a 416 Rigby and the "total" recoil is lower BUT isn't the recoil profile more like a slap than a...

You guys have been great on the 404 Jeff and optics! I wonder if you could take off 2 1/2 inches off a ported 27 inch double barrel in 375 H&H and not screw up regulation? Rick Hill

Thank you all for the outpouring of info on the 404 Jeffery. I think there are some times that you would like both eyes open when shooting but might like some higher power mag for a longer shot. I am looking at a longer eye relief, 1-6x24 Swarovski optik Z6 for a 404 Jeffery and 416 Rigby. I...

Hello, New to your forum. Have a left handed Montana Rifle Company Safari Supreme in 404 Jeffery. It seems a rather unappreciated but versatile caliber with lower amounts of recoil. Question - Why is a .423 called a 404? Was it because it was a 40 caliber developed in 1904 and released in...