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30br vs 30bra

jvshiver

jvshiver

Gold $$ Contributor
Wondering how much difference in case capacity and velocity there is. I know H4198 is the go to powder for the 30br, and seems with N130 there is not enough room in the case yo reach the same velocity, I’ve seen some guys having good luck with N120 and Lt30. Any thoughts on the extra little bit of case room with the 30BRA being useful powder wise now that 4198 is not available? Thoughts? Experience?
 
Cant tell you if its enough to run those other powders. Only shot h4198. It was good for another node over the straight BR. Similar to what it does in the 6mm. I have chambered a few, but not for any serious score shooters so thats about all the feedback I can pass on at this time. The main reason I liked it was less brass trimming. These barrels last so long and so does the brass that I like the 40 degree shoulder.
 
jvshiver said:
Wondering how much difference in case capacity and velocity there is. I know H4198 is the go to powder for the 30br, and seems with N130 there is not enough room in the case yo reach the same velocity, I’ve seen some guys having good luck with N120 and Lt30. Any thoughts on the extra little bit of case room with the 30BRA being useful powder wise now that 4198 is not available? Thoughts? Experience?
Click to expand...

I respectfully disagree with your premise.

Using a BIB 112/7 bullet in an unmodified 30BR case, my best agg'ing N-130 load of 35.6 gr is giving me 3091 fps versus 3104 fps for 34.8 gr H-4198. 35.9 gr of N-130 yields 3105 fps.

I'll never go back to H-4198.
 
Kyle Schultz said:
I respectfully disagree with your premise.

Using a BIB 112/7 bullet in an unmodified 30BR case, my best agg'ing N-130 load of 35.6 gr is giving me 3091 fps versus 3104 fps for 34.8 gr H-4198. 35.9 gr of N-130 yields 3105 fps.

I'll never go back to H-4198.
Click to expand...
How long of drop tube and time frame are you using to get 35.9 in the case?
 
jvshiver said:
Wondering how much difference in case capacity and velocity there is. I know H4198 is the go to powder for the 30br, and seems with N130 there is not enough room in the case yo reach the same velocity, I’ve seen some guys having good luck with N120 and Lt30. Any thoughts on the extra little bit of case room with the 30BRA being useful powder wise now that 4198 is not available? Thoughts? Experience?
Click to expand...
N120 is not the optimum powder in a 30BR. I've done experiments at home here with it and it's just a tad too fast for it to work well and as Kyle pointed out It's not true that you can't reach the same velocity with N130 that you can with 4198.
 
JimPag said:
N120 is not the optimum powder in a 30BR. I've done experiments at home here with it and it's just a tad too fast for it to work well and as Kyle pointed out It's not true that you can't reach the same velocity with N130 that you can with 4198.
Click to expand...
The other side of that coin is that h4198(most lots) are a tad too slow to be ideal. I think a BRA has potential with h4198. The 30 Dasher and 30 BRX were a tad too much recoil at the next node and the BRA might be too. I haven't done much 30 testing in a few years now but I think we're at the point where splitting these hairs is what it's all about at the top of the game...but just a straight up 30BR is still hard to beat. I'm referring to absolute optimization of a given powder and lot number to case capacity. I think n120 is phenominal in some lots. I wish it was the same powder as it was about 10 years ago or so. That was hands down my all time favorite powder but it just has limited useful applications. Metered great, burned clean, super consistent(then) and not spikey. It did everything very well. It's just not quite the same. Kinda like the old T powder vs a very good LT32. Good....but not the same good.
 
I wish I had some N130. I watched Kyle shoot it at The Battle of San Jacinto at Tomball and he did great.

No one has had any for a while. I still have a couple of years worth of H4198,
 
Interim update, wanted to share a little of my testing with my 30BRS, This morning, (78 degrees, very humid and overcast skies) finally had a chance to initially confirm that some bullets (certain brand) still need additional testing before I give out the brand, and a different brand (Eazor) is in the spot I like. Second item, I am using N-130 and I am liking it so far.

Target spec for the below target for seating depth tests. Powder charge is all the same for all rounds in #1 thru #6, Powder data, N-130 37.1 grains (this is a second round for seating depth test), trying some in between depths.

Tgt Bull #1- (118 gr, certain brand of bullet) touching the lands (3 rounds fired)
Tgt Bull #2 - Same bullet as above, .025 into the lands, (3 rounds fired)
Tgt Bull #3 - Same bullet as above, .030 into the lands (3 rounds fired)
--------------
Tgt Bull #4 - 118 gr. Eazor bullets, touching the lands (2 rounds fired)
Tgt Bull #5 - 118 gr. Eazor bullets .020 into the lands (3 rounds fired)
Tgt Bull #6 - 118 gr. Eazor bullets .030 into the lands (3 rounds fired)

#5 is looking good, will have to confirm.

"Sighter bulls were a different load all together, not a part of the above test loads"

Hopefully I can run a few 30BR tests soon with the N-130.

Trying to be ready for the UBR Nationals next month. :)

Tim
 

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DaWhit said:
What kind of velocity are you getting with 37.1 and 118s?
Nice shooting!
Click to expand...
Thanks for the compliment.
Not sure on the velocity. I haven't chronographed it with the N-130, just using my targets to guide my load rather than speed. I should check it, you made me curious.
Thanks,
Tim
 
DaWhit said:
35.6gr N130 timed a little over 3000 with a 118 BIB the other day. Not sure how loads compare in the BR VS BRS.
Click to expand...
Thanks for the comparison velocity for the 30BR with the N-130 load. I have some initial load testing to do on a separate 30BR rifle with the N-130. If I remember correctly, I was right around that velocity in my BR with 34.5 gr. of H-4198. It would stack them in there if I did my part.

The 30BRS is .080" longer at the shoulder than the 30BR, making the neck a bit shorter than the 30BR.

Tim
 
jimmymac said:
Targets 4 and 5 sure do look good! Your optimal seating depth is in there somewhere! You should be able to shoot some dots. Good luck at the Nationals.
Click to expand...
Yes,going to confirm the seating depth hopefully next weekend.
Looking forward to the Nationals.
Haven't shot much this year, work has had me out of town. Setting in the airport in Chicago waiting on a connecting flight while writing this.
Tim
 
TIMO said:
Yes,going to confirm the seating depth hopefully next weekend.
Looking forward to the Nationals.
Haven't shot much this year, work has had me out of town. Setting in the airport in Chicago waiting on a connecting flight while writing this.
Tim
Click to expand...


Well good luck to you Tim. I won't be at the Nationals, so you are one up on me. I've shot a good of UBR this year so all is not lost. Timing for me and the Nationals is poor. After this month, I'll be on the shelf until next season. Have fun.
 
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