You know .300 WM remains my go-to chambering. No loaded ammo? I am OK with that as I am not dependent on it. As soon as I get enough range time with the USO, I will let you know. The Whidden is for my .30 LARA. I have Redding dies for the .30 Gibbs.
.30 GIBBS is finally ready ...
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You know .300 WM remains my go-to chambering. No loaded ammo? I am OK with that as I am not dependent on it. As soon as I get enough range time with the USO, I will let you know. The Whidden is for my .30 LARA. I have Redding dies for the .30 Gibbs.
Do you mind sharing here for others to see and benefit from? Thank you in advance.
Ed
montana west
Well-Known Member
feenix , yes the 300 win mag is the best 30 cal in the world but the 30 Gibbs will do the same thing without all the recoil and the animals will never never know the difference in 50 fps. and the range could be 1 " at 600 yards in other word they are the same even better than the comparsion of the 308 win to the 30/06.. again the 35 % sholder is a hell of an improvement. now you can do the same with a 270 win cases just neck it up to 323 338 or 358 going in steps from 308 first and fire form you know the 270 case is also 64 mm just like the 280 case you must have a ring to seat the head space thus the 323 338 or 358 neck dia before useing the 30 gibbs die.. if you want 280 brass from the 270 win you have to neck the 270 up to 323 then fire form in the 280 case and wham O you have 280 reming brass. never never fire 270 brass in a 280 without necking up to 308 ore 323 then back down to 280 with a headspace ring on the thing..
Do you have starting loads worked up for this? Quickload has the 30 Gibbs in their database. I can do a quick run if you like, maybe the 178gr or what bullet are you thinking to start with?
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montana west
Well-Known Member
OK gibbs loading data 180 gr bullet with 64 gr Imr 4350 =3137 DO NOT use this it is too HOTTTTT.mabe start with 62 gr of reloader 22 or H-4831 and work up mabe 64 gr of Ramshot Magnum. with 200 gr bullet gibbs says 63 gr of 4350 at 2900 , again only use 61 grain of reloader 22 or H 4831. then if your primers are still round and no extractions marks on back of brass you can increas max 1 gr at a time. However you will find the sweet load for this wonderful calibre
Cool, thanks!
Sure, go for it. 178 is an excellent start. Thanks!
Awesome! I was going to start conservatively at 56g H4831SC for the 178.
J E Custom
Well-Known Member
The effective freebore should be between . 222 and .250. The AI version performs well at this freebore but only add 2 grains more case capacity with the 40o shoulder. They also have an unusual throat so this free bore length is greatly effected by the bullet design.
It was also intended to be able to shoot round nose bullets. the longer free bore helps keep the pressure under control.
I am a big AI fan, but in this case I believe you picked the best cartridge design.
J E CUSTOM
bigngreen
Well-Known Member
Have you gotten a fire form d capacity yet, there seems to be a couple numbers floating around?
I think there will always going to be a disparity between capacity claims esp. with the variety of brass and their manufacturing differences. This is going to one of those test data I hope to collect for comparison. Anyway, I measured one and I was getting 73.96g of H20. This is Hornady brass fire-formed with 11g of WSF only (COW method).
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OK, here is a run with the 178 and different powders. Let me know specifics and I'll run a few of those or different bullets, etc.
WOW! Thank you Sir.
