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Post by cpct on Feb 27, 2015 6:03:38 GMT -8
I see on the other threads a respectable amount of effective powders for the A30. My question is the use of IMR 8208XBR and H322 for the 125's. Will these two powders work? I like that H335 is getting great velocity and accuracy, but I have more 8208 for load development, and I REALLY like that powder in the 6x45. Any help is greatly appreciated.
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Post by Deleted on Feb 27, 2015 6:42:53 GMT -8
I see on the other threads a respectable amount of effective powders for the A30. My question is the use of IMR 8208XBR and H322 for the 125's. Will these two powders work? I like that H335 is getting great velocity and accuracy, but I have more 8208 for load development, and I REALLY like that powder in the 6x45. Any help is greatly appreciated. Both powders you mentioned were used during testing and found to have to slow of a burn rate. The powders we found most suitable for the A30 are IMR4198, H4198, RL7, AA2200. There are other powders that will work, but the 4 I mentioned are the best suited. |
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Post by american30 on Feb 27, 2015 8:10:07 GMT -8
Did you notice any difference in the H4198 vs IMR4198?
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Post by Deleted on Feb 27, 2015 8:36:28 GMT -8
Did you notice any difference in the H4198 vs IMR4198? Yes we did. The IMR4198 was notably faster than H4198. IIRC the IMR was about 100FPS faster with the same bullet. |
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Post by cpct on Feb 27, 2015 19:06:09 GMT -8
Thanks. How was the pressure with the IMR 4198?
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Post by Deleted on Feb 28, 2015 7:00:45 GMT -8
Thanks. How was the pressure with the IMR 4198? All our published loads are 56,000 PSI or less |
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Post by cpct on Feb 28, 2015 12:00:18 GMT -8
OK. Thanks. Now for the final question before I order my new barrel.....I live in lead free California and my options for lead free bullets in 30 caliber are slim, basically the Barnes 110-150 grain TTSX or TSX, with the 110 or 125 being the optimum for my application, pig hunting. My question....If I go with the 110 in 30 caliber or the 110 in 6.8SPC, What are the advantages of the 30 caliber over the .277, and what twist rate would be the best in the American 30? Hope this makes sense.
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Post by GLSHOOTER on Feb 28, 2015 15:16:13 GMT -8
OK. Thanks. Now for the final question before I order my new barrel.....I live in lead free California and my options for lead free bullets in 30 caliber are slim, basically the Barnes 110-150 grain TTSX or TSX, with the 110 or 125 being the optimum for my application, pig hunting. My question....If I go with the 110 in 30 caliber or the 110 in 6.8SPC, What are the advantages of the 30 caliber over the .277, and what twist rate would be the best in the American 30? Hope this makes sense. For the piggies the 110 will do it all for you. Make sure you keep them out of the lands by about 0.050. 1:11 will turn the trick. Depends what 277 you are referring to. The small case stuff is getting a workout lately. If you are taliking the Wolverine the A-30 will run faster with more energy based on case capacity across the board on all grain levels thanks to the expansion ratios at normal pressure loadings. In a 6.8 SPC they are going to be neck and neck in speed in the 110's. A 6.8 can't hope to throw a 150 at the speeds of the A-30 and the 125's actually show the A-30 pulling away if you use factory SAAMI pressue ammuntion. Given a range of 200 yards or so the equation comes down to the size of the hole. 308 has about 23% more frontal area than the 277 and 11% more diameter. That means simple damage will give the nod to the 308 every time. Of course the 270 Win is a tad differt horse..LOL Greg |
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Post by cpct on Feb 28, 2015 17:29:45 GMT -8
Thank you very much Greg. You've been more than helpful. OK...One last thing....I've settled on the Barnes 130 TTSX and either RL7 or H4198 because my local shop has it. Can you give the recommendation on which one of the two powders is best for that bullet and starting load to maximum. I NEVER go above maximum, and usually do a middle of the road load for safety. I plan on getting the 16" barrel. Is the 1:11 still a recommended twist? BTW...I was comparing the A30 to the 6.8SPCII. Thanks again for all your help. This is why I'm a BHW lifer!!
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Post by Deleted on Feb 28, 2015 18:10:12 GMT -8
Thank you very much Greg. You've been more than helpful. OK...One last thing....I've settled on the Barnes 130 TTSX and either RL7 or H4198 because my local shop has it. Can you give the recommendation on which one of the two powders is best for that bullet and starting load to maximum. I NEVER go above maximum, and usually do a middle of the road load for safety. I plan on getting the 16" barrel. Is the 1:11 still a recommended twist? BTW...I was comparing the A30 to the 6.8SPCII. Thanks again for all your help. This is why I'm a BHW lifer!! Of the two powders you have access to, I would use RL7. I would also think serious about using the 110 grain bullet. The 130 is going to protrude a long way into the case. The 1 in 11 twist will cover everything you will shoot, unless you try the subsonic stuff. |
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Post by cpct on Feb 28, 2015 18:23:28 GMT -8
A starting load and a max load for the 110's? Thanks again.
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Post by GLSHOOTER on Mar 1, 2015 7:11:44 GMT -8
A starting load and a max load for the 110's? Thanks again. RL7 would probabaly be good starting at 29 going to 31. We have NEVER shot any solid bullets. Our 110 Sierra HP load maxed at 34. That being said the bullets are as similar as Zebras and Kangaroos. That long shank bulet that doesn't compress will show pressures very quickly so you must back down. Greg |
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Post by cpct on Mar 1, 2015 7:43:46 GMT -8
I was thinking 27-30 based on what you said for the 7.62x39, so we're thinking the same thing. I am probably going with the 130 grain Barnes TTSX simply because the California hogs, at least the ones on the ranches I shoot, can be on the large side. I've had 450+ pound hogs in my sights, but seriously undergunned when I had on my .223 Wylde upper. The one in this picture took 3 shots from a friend's .270 and it took me to put a .40S&W to the head to finish it. I think this one was 376 pounds. My friend probably had the wrong bullet type, as he likes bullets on the light side and probably got pass throughs. Bullet choice is EVERYTHING.. . |
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Post by madcat on Mar 1, 2015 8:59:22 GMT -8
I was going to try that 130gn ttsx but was afraid it might be to long and cause too much compression. I am curious how they work out for ya so please post back your results.
I am still playing with the 125 accubonds but have been rained out for weeks. I am betting the 110 gn TTSX's would be a sweet shooter also.
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Post by geepee3 on Mar 1, 2015 10:18:24 GMT -8
Any recommendations for a mid length gas system.
I have tried the four powders R. Johnson recommended.
The BHW barrel is an 18" mid length.
Once over 2460 fps with a 123 or 125 grain projectile I start getting pressure signs after the first two shots of a string of five.
I was hoping to be able to get over 2500 fps with this barrel, but so far no go.
Also getting pressure signs with 110 grain Nosler with 29 grains of RL-7 powder. Again after two shots, the rest show signs.
Any help will be appreciated.
Glenn
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