.30 GIBBS is finally ready ...

FEENIX

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Very nice rifle!!

I've read a little about improved .30 06 cases recently and have been thinking it would be nice to have a cartridge that has just slightly more oomph than the standard .30 06. It seems that the AI version gives people varied results and is mostly beneficial to those with a longer barrel.

How would the .30 gibbs do in a 22" barrel? Would the benefit of reaming the chamber of a .30 06 to .30 gibbs still be there with this short of barrel?

Also, I've been wondering about how effective the improved .30 06 wildcats are in various factory barrels. For example Tikkas are known to have a long throat, or freebore, or jump... whatever the correct term is. The 300 PRC was designed to have a longer head height to fit the really heavy for caliber bullets while keeping the bullet out of the powder column. I'm wondering, would it be smart to rechamber a Tikka .30 06 into a .30 gibbs in order to be able to use the heavier bullets without having the bullet in the powder column and not have the bullet seated into the lands? Of course then you'd be stuck with the 22.5" barrel.

I'm not planning to do this any time soon, as I love my .30 06. I've just been dreaming about a "someday" gun.

Absolutely nothing wrong with dreaming or the venerable 30-06. I have a Remington 1903 in .30-06 that is a shooter.
 

FEENIX

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Ryan, back in the 90's I and one other fella did 30 G's. His was 22", mine 23" we were pretty much 100 fps over the plain Jane 06 (course we had no way to pressure test). Pretty much a 06 Ackley. Cept the AI is easier to form.

Fun project, glad I did it once...:)

Like most of the things we do, it's cause we want and that's all we should need.

Please feel free to add any pertinent information you feel helpful. Thanks.
 

ted7

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Used a 25 Gibbs that Rocky Gibbs made for me in 1964 from a pre war model 70 chambered in 257 Roberts. Ballistic wise very similar to 257 Weatherby in a 26 inch barrel. Used I believe were 125 gr Noslers for medium range and 117 gr Sierra boat tails for anything past 350 yards. Took a number of Idaho elk with this rifle and many years worth of large Alaskan caribou, Dahl Sheep, and moose. A flat shooting cartridge that is cheap to hand load and easy to do just fill case with 4831 about 63 grains. You can use 06 brass but with 270 brass you only need to run through sizing die once to prepare cases for fire forming. Used 5 gr bullseye and oatmeal to fill case and seal case mouth with bees wax. So happy to see the current generation keeping Gibbs very practical cartridges alive!
 

FEENIX

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I finally made it to the range today and played with my LabRadar.

190 Berger VLD, OAL = 3.340", CBTO = 2.667", WLR, just trying some powder already open and not after any accuracy, and no seating depth goal at the moment, maybe on the next round.

5-shot series
60.0 H4831SC: AVG = 2558, ES = 20, SD = 10
60.5 H4831SC: AVG = 2577, ES = 45, SD = 24
61.0 H4831SC: AVG = 2599, ES = 29, SD = 13

4-shot series
56 RL17: AVG = 2779, ES = 28, SD = 13
57 RL17: AVG = 2806, ES = 15, SD = 6

All groups well within 1 MOA.
Both still have room for powder, no pressure signs
RL17 shows promise but still have quite a few powders to try and not sure if I'd stick with 190 Bergers.
 

elkaholic

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I finally made it to the range today and played with my LabRadar.

190 Berger VLD, OAL = 3.340", CBTO = 2.667", WLR, just trying some powder already open and not after any accuracy, and no seating depth goal at the moment, maybe on the next round.

5-shot series
60.0 H4831SC: AVG = 2558, ES = 20, SD = 10
60.5 H4831SC: AVG = 2577, ES = 45, SD = 24
61.0 H4831SC: AVG = 2599, ES = 29, SD = 13

4-shot series
56 RL17: AVG = 2779, ES = 28, SD = 13
57 RL17: AVG = 2806, ES = 15, SD = 6

All groups well within 1 MOA.
Both still have room for powder, no pressure signs
RL17 shows promise but still have quite a few powders to try and not sure if I'd stick with 190 Bergers.
I found that IMR 4831 worked better than H4831 with that class bullet in my case with the same capacity. RL17 was also good and I would definitely try some Hy100V.
Good luck!…....... Rich
 

LVJ76

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I finally made it to the range today and played with my LabRadar.

190 Berger VLD, OAL = 3.340", CBTO = 2.667", WLR, just trying some powder already open and not after any accuracy, and no seating depth goal at the moment, maybe on the next round.

5-shot series
60.0 H4831SC: AVG = 2558, ES = 20, SD = 10
60.5 H4831SC: AVG = 2577, ES = 45, SD = 24
61.0 H4831SC: AVG = 2599, ES = 29, SD = 13

4-shot series
56 RL17: AVG = 2779, ES = 28, SD = 13
57 RL17: AVG = 2806, ES = 15, SD = 6

All groups well within 1 MOA.
Both still have room for powder, no pressure signs
RL17 shows promise but still have quite a few powders to try and not sure if I'd stick with 190 Bergers.

That's is nice. RL17 looks to be the winner here especially with more room for powder. I also like the low ED and SD.

Stay safe
 

WWP2012

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I finally made it to the range today and played with my LabRadar.

190 Berger VLD, OAL = 3.340", CBTO = 2.667", WLR, just trying some powder already open and not after any accuracy, and no seating depth goal at the moment, maybe on the next round.

5-shot series
60.0 H4831SC: AVG = 2558, ES = 20, SD = 10
60.5 H4831SC: AVG = 2577, ES = 45, SD = 24
61.0 H4831SC: AVG = 2599, ES = 29, SD = 13

4-shot series
56 RL17: AVG = 2779, ES = 28, SD = 13
57 RL17: AVG = 2806, ES = 15, SD = 6

All groups well within 1 MOA.
Both still have room for powder, no pressure signs
RL17 shows promise but still have quite a few powders to try and not sure if I'd stick with 190 Bergers.

N555 will work well, it has similar magical qualities of RL26 except for lighter bullets.

I am pushing a 181 Hammer at 3039fps and a 180 Accubond over 3100fps. You should have just a hair more case capacity over my Sherman. If you want powder data I did quite a bit of testing before settling on N555. Shoot me a PM.
 

FEENIX

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I found that IMR 4831 worked better than H4831 with that class bullet in my case with the same capacity. RL17 was also good and I would definitely try some Hy100V.
Good luck!…....... Rich

I have both IMR 4831SC and H100V but as I said, I am starting with powders already opened. Thanks.

N555 will work well, it has similar magical qualities of RL26 except for lighter bullets.

I am pushing a 181 Hammer at 3039fps and a 180 Accubond over 3100fps. You should have just a hair more case capacity over my Sherman. If you want powder data I did quite a bit of testing before settling on N555. Shoot me a PM.

I have RL26. I can get N550 but not N555. What's your barrel length? If I decide on 181 Hammer, I will definitely ping you. Thanks.
 

ButterBean

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West Terre Haute Indiana
I finally made it to the range today and played with my LabRadar.

190 Berger VLD, OAL = 3.340", CBTO = 2.667", WLR, just trying some powder already open and not after any accuracy, and no seating depth goal at the moment, maybe on the next round.

5-shot series
60.0 H4831SC: AVG = 2558, ES = 20, SD = 10
60.5 H4831SC: AVG = 2577, ES = 45, SD = 24
61.0 H4831SC: AVG = 2599, ES = 29, SD = 13

4-shot series
56 RL17: AVG = 2779, ES = 28, SD = 13
57 RL17: AVG = 2806, ES = 15, SD = 6

All groups well within 1 MOA.
Both still have room for powder, no pressure signs
RL17 shows promise but still have quite a few powders to try and not sure if I'd stick with 190 Bergers.
Looking Good Brother
 

WWP2012

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Messages
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SW Michigan
I have both IMR 4831SC and H100V but as I said, I am starting with powders already opened. Thanks.



I have RL26. I can get N550 but not N555. What's your barrel length? If I decide on 181 Hammer, I will definitely ping you. Thanks.

24” barrel, RL 26 is too slow, I got better velocity out of faster powders. it didn’t start to work until I got into a 200 class bullet. I shot a 208g Amax at 2920fps. Otherwise For 180g bullets RL23 was too slow But may be good for a 190g, H4831sc and IMR 4831 was ok up around 2850-2900. H4350 worked well, RL16 gave good velocity, but N555 was denser and I could get 1-1.5g more in the case. It compresses better than RL16 so I order 8lbs. Plus it is crazy accurate, I shot my best groups with it. I didn’t test N560 but it should match up pretty good in the 180-190 weight class.

Also, look into Peterson 280ai brass. With the main shoulder already formed it turns out longer necks.
 
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