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30 Gibbs shoots

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Unread 01-18-2003, 07:55 PM
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Join Date: May 2001
Location: Pennsylvania
Posts: 1,757
Re: 30 Gibbs shoots


Ray has the dies in stock.

There is a few benefits to the longer neck. They are, seating and holding of the bullet, neck tension and having the extra length to set the bullet out further if you so desire. More powder room capacity when you can set the bullet out further.
There are other reasons, but these are the ones most talked about.

Most reloaders like to have a longer neck to work with.

Crow mag

Just look at the ballistics on the 257 Weatherby and that's what the 25 Gibbs will do for you.
It does make a good Varmint round and don't blink your eye or you will miss the hit.
That's with the 100 gr Ballistic tip bullets at 1100 yds too.
A bit rough on throuts with full power loads.


[ 01-18-2003: Message edited by: Darryl Cassel ]
Darryl Cassel
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Unread 01-20-2003, 01:44 PM
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Join Date: Jul 2001
Posts: 1,459
Re: 30 Gibbs shoots

JerryM, I too was a little skeptical about the results. Well, not anymore. My barrel is 26 1/2", 1 in13twist. My load uses H4350 and moly 165gr SST lit with a Fed 215M primer. Loaded to just off the lands, the accuracy has been really good (1/3MOA at 250yds). Vel is 3000fps. I can get to 3100fps but groups open up and brass life is VERY short - max load would be about right.

Using H4831SC, the vel is slightly under 2900fps and the accuracy is even better.

I am sticking to the H4350 because the extra vel is what I am after and the accuracy is small enough for the intended use. Will try shooting at LR when the snow melts a little.

Goal is reliable shooting from field rests under 3/4 MOA at 950 yds.

Thanks for the offer Darryl but I am going to stick to the H4350 simply because it is working in this and other rifles. I don't want to stock too many other powders.

As to the fears of a short neck, try this experiment. With your boattail bullets seated in the case, put another beside and see how much of the bullet is actually held by the neck. I bet it is a lot less then you think.

When I did this with my SST and my '06, I found that only 1/4" of the bullet was held. The boattail occupied most of the neck/shoulder. My Gibbs holds as much of the bullet as the longer necked '06. It also allows loads that are very close to the RSAUM.

Magazine capacity is higher then the short magnums, brass is everywhere and "free", performance is very similar. Would recommend the Gibbs family to anyone looking for more performance out of the '06 family of cartridges.

Good stuff..

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Unread 04-18-2016, 08:41 PM
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Join Date: Mar 2016
Posts: 5
Re: 30 Gibbs shoots

Excellent I have 2 30 Gibbs as well a Springfield and 98 mouser both shoot well yes never doubt rocky I get 300 mg velocity as well
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Unread 04-18-2016, 09:09 PM
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Join Date: Dec 2008
Location: Great Falls, MT
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Re: 30 Gibbs shoots

Very nice dig!

I voted for my "FREEDOM", "GUNS", and "MONEY" - keep the change - UNK.

"I am always proud of my country!"

"Leadership Rule #2: Don't be an ***hole." - Maj Gen Burton Field.
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Unread 04-18-2016, 10:57 PM
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Join Date: Aug 2013
Location: Grants Pass, Oregon
Posts: 1,648
Re: 30 Gibbs shoots

I made a .25 wildcat with a slightly shorter neck than the Gibbs. I ran GSCustom 85HV bullets with H4831. While testing primers I chronographed thirty shots. The average was 3,919 feet per second.
Wildcats 'til the factories catch up.
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Unread 04-19-2016, 12:45 PM
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Join Date: Dec 2008
Location: rathdrum, id.
Posts: 5,259
Re: 30 Gibbs shoots

The Gibbs WILL do what people say! It was actually the reason the Sherman case was developed. I was going to build a Gibbs, but did not like the short neck so designed the Sherman case as a result. The cases are identical in capacity, but the Sherman has less body taper and a 40 degree shoulder for less case stretching and better barrel life, because it also has a much longer neck. I had no problem reaching 3050' with 190's in a 26" barrel. The Sherman reamer will clean up a 30-06 chamber, or a Gibbs for that matter. They both are truly a magnum on an '06 head size......Rich
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