WARNIG DO NOT COPY ME. DO NOT LOAD ANY ROUND LISTED BELOW. READ AT YOUR OWN RISK.
thru the strange trades beween S&W the senior and my self I ended up with his remington 721 in 30 gibbs (he admited later he was sacred to load for it).
The 30 gibbs is the second cartrige developed by Rocky Gibbs in the late 60's.
Tje cartrige is based on the 30-06 case that has been "improved" by removing any tapper to the case and instead of just changing the shoulder angle as with ackley type improved models the shoulder is moved forward to increase powder capasity. By increasing the case capasity and loading the 06 type case to 270 pressures some have gotten 300 H&H ballistics.
The first thing I had to do with the rifle is get some cases formed. In the book Wildcats that is a bunch of old articals from handloader and rifle magazines I read about the differing Gibbs cartriges and how these cases were formed. There was a hydrolic method involving dies I don't have, a method involving seasting a flat based bullet backward over a starting standard 06 load, and making a blank cartrige with pistol powder and cream of wheat.
The first case I tried to form I tried a charge of bullseye with a cleaning patch jammed in the case neck. The result was a half formed shoulder. Scratch that method. Next I tried a small charge of bullseye with malt-o meal filler and a wax plug to keep everything together. with some trobble with the extractor grabbing the case I managed to fire a few malt-o-meal specials. It worked ! On a few of the once fired cases there was case stretching just ahead of the web and I tossed them but I found a method that works.
After having 7 cases formed I went over to Gunstop to get some new W-W cases and a few 180gr psp 30 cal bullets to try the next method. using new cases and IMR 4895 I loaded up some base forward loads seating out the bullet so the base of the bullet pressed firmly into the lands of the BBL. since this was going to take a trip to the range I also figured out how to partial neck size the formed 30 gibbs cases in my 30-06 dies and made a few test rounds with the rem 180's and IMR 4895. Off to Bills gunshop north. After the R.O. giving the hairy eyeball I went off to my firing point and blasted away. The 30 Gibbs cases looked fine after the test loads, nice looking primers easy extraction. then off to the backward bullet loads. Five round down range and five cases that look OK.
After all this I found the malt-o-meal specials work best for case forming despite being told my rifle is stinking like burned oatmeal. I picked up some 165 ballistic tips and I'll have to add a crony to the shopping list. Once I have the above I'll let you know how it works.
P.S. if any of the MN metro mebers on THR would taqke a few pics of this project just PM or e-mail me.
thru the strange trades beween S&W the senior and my self I ended up with his remington 721 in 30 gibbs (he admited later he was sacred to load for it).
The 30 gibbs is the second cartrige developed by Rocky Gibbs in the late 60's.
Tje cartrige is based on the 30-06 case that has been "improved" by removing any tapper to the case and instead of just changing the shoulder angle as with ackley type improved models the shoulder is moved forward to increase powder capasity. By increasing the case capasity and loading the 06 type case to 270 pressures some have gotten 300 H&H ballistics.
The first thing I had to do with the rifle is get some cases formed. In the book Wildcats that is a bunch of old articals from handloader and rifle magazines I read about the differing Gibbs cartriges and how these cases were formed. There was a hydrolic method involving dies I don't have, a method involving seasting a flat based bullet backward over a starting standard 06 load, and making a blank cartrige with pistol powder and cream of wheat.
The first case I tried to form I tried a charge of bullseye with a cleaning patch jammed in the case neck. The result was a half formed shoulder. Scratch that method. Next I tried a small charge of bullseye with malt-o meal filler and a wax plug to keep everything together. with some trobble with the extractor grabbing the case I managed to fire a few malt-o-meal specials. It worked ! On a few of the once fired cases there was case stretching just ahead of the web and I tossed them but I found a method that works.
After having 7 cases formed I went over to Gunstop to get some new W-W cases and a few 180gr psp 30 cal bullets to try the next method. using new cases and IMR 4895 I loaded up some base forward loads seating out the bullet so the base of the bullet pressed firmly into the lands of the BBL. since this was going to take a trip to the range I also figured out how to partial neck size the formed 30 gibbs cases in my 30-06 dies and made a few test rounds with the rem 180's and IMR 4895. Off to Bills gunshop north. After the R.O. giving the hairy eyeball I went off to my firing point and blasted away. The 30 Gibbs cases looked fine after the test loads, nice looking primers easy extraction. then off to the backward bullet loads. Five round down range and five cases that look OK.
After all this I found the malt-o-meal specials work best for case forming despite being told my rifle is stinking like burned oatmeal. I picked up some 165 ballistic tips and I'll have to add a crony to the shopping list. Once I have the above I'll let you know how it works.
P.S. if any of the MN metro mebers on THR would taqke a few pics of this project just PM or e-mail me.