bib 10 ogive

L

longrange223

Guest
switched to bib 10 ogive from the 7 ogive & having problems working up a good load,anyone have any useful info onwhere to start at with the tens?are they harder to tune?any info will be a great help
 
What are you shooting them in?? Tell us about the load as well.

Mike Swartz
 
sorry bout that,it's a 30br,don't know about powder weight,started out at last years load at 63+4 clicks on my measure & .015 jam,gun liked to shoot around 3000fps with the 7 ogive,got it there & no lucksince then i've been everywhere from 62-64 in 2 click increments & from .020 off the lands to .025 jam,it's a 17 twist spencer bbl,i've been between 2950fps to 3115fps,no luck,tried .002-.004 neck tension,never had a bullet so hard to tune,shot over 200 rds so far & it still won't agg like the 7's,any ideas?
 
I'd go back to the 7's if they worked. Is there a reason you desire to try harder to shoot as well as you did with the 7's in order to do it with a 10? Even then if it's that finicky, how long will it stay in tune? If the 7's work, don't change.

Paul
 
longrange:

I would try this approach: .030 'jam',neck bushing .004 under what a loaded round measures, Fed 205 primer, and H4198. Without changing anything else, run the powder up from 32.5 to 34.5 by .5's shooting 3 shot groups. Use the powder setting from whatever group looks best out of those and start backing off the seating depth .005 at a time until it shoots better or gets worse. Take the best group from this and play with neck tension.

But first of all..how much neck clearance do you have over the pressure ring?

Hope this helps. -Al
 
If the quality of the bullet is the same, I have never found higher-ogive bullets that much harder to tune -- there can be a lot built into that "same quality," though. But if these are Randy Robinett's 10-ogives, I'd have no questions about the quality. The only possible problem would be jacket quality, and Randy would know even that, obvious problems by miking a new lot of jackets, intangible problems by other shooters reporting problems. One of the things about Randy is he takes care of his customers.

As to your problem -- some barrels seemingly don't like some bullets. I have no idea why, but have seen it too often to ignore.

As to what to try -- Sounds to me like your initial testing covered most of what Al recommended, except maybe the neck clearance. Try for at least .002 total & sacrifice a few cases by going up to .004 total. That's clearance, not tension.

The other thing I'd try is different powder. N-130 comes to mind. I have a .30 BR that just won't agg with 4198 but shoots lights-out with N-130 . For this barrel, the 4198 is a teaser.

I've also heard of good, consistent results using N-120 -- fast, so back off the charge. And of all things, N-530 has worked.

You can't get quite the velocity with any of these, but there ain't no prizes for speed. As long as you can get to a good spot on the pressure curve, they'll agg.

Of course, the obvious solution is to go back to the 7-ogives, but if you can't get any right away & have to shoot the 10s, check the neck clearance & try a different powder.

FWIW
 
I started shooting the 30BR about 4 or 5 years ago. At that time I asked Joe Entrekin and Henry Rivers what to shoot. They told me to try H4198 with BIB 118 ten ogive bullets loaded hard in to the lands. When I got my rifle finished, I loaded up some rounds with the power amount they told me and set the seater so the bullets were hard into to the lands on a little gauge I make from a piece of the barrel with the reamer run in to cut most of the shoulder. I took the rifle out to the range and tried that load. The rifle shot so well that I did not think I could make any improvement. I have shot that same load in at least 10 barrels. They all shot well. I have helped friends with their rifles and got them shooting with the ten ogive bullets. To this day I still do not know how hard I am into the lands, and I have not changed seating depth even though I have more that 6 thousand rounds on one barrel. I also shoot groundhog shoots so I made a 30 X 47. I tried all different bullets with it and the best bullet was the with BIB 118 ten ogive. I have shot my best group with any rifle at 500 yards with that round and the BIB 118 ten ogive bullets. I am not saying that other bullets will not shoot but that if I do my part with these bullets I should win. I have a .330 neck and turn my brass to .010. I use a .324 bushing and moly coat my bullets.

Rod Morton
 
That's the reason I asked about the particulars of the rifle and set-up.This is my go-to bullet in a .30BR. I have never seen a great difference in quality of accuracy between the subject bullet and the (7) ogive from the same maker. The same bullet form works well in 127gr for me in 30X47.

Mike Swartz
 
30BR loads

Charles,
I noticed what you said about different powders in the 30BR. I did some comparisons out at the range last year with Benchmark, 4198, and VV 130. The 130 grouped better than the other two. I am loading 35 grs. of 130. Just out of curiousity how many grains of 130 does your 30BR like?

Thanks,
Dan Batko

"Where are we going, and why am I in this basket?"
 
I would try

Try shooting some more of the 7's. Something might have changed in your rifle since you shot them last. They may not shoot any better than the 10's now.

Michael
 
I've a barrel that simply won't shoot 10's. I tried every load permutation that I could think of. It shoots 7's just fine.
 
Charles,
Thanks for the reply.

Dan Batko

"Where are we going, and why am I in this basket?"
 
wanted to thank all who've tried to help me with this problem but randy robinette called me at home this evening & offered to replace the 10 ogive bullets with 7 ogive that my gun likes,our sport needs more suppliers like randy,he's going out of his way to see that a customer is satisfied even though the problem is no fault of his own,he's a pleasure to deal with & he has my thanks!
 
I have tried 10's too

But the way I tune, they are finicky, or have been for me anyway. I like 7's. They shoot every bit as good as 10's from what I have seen and are a lot easier to work with, in my opinion.
 
The list of local, State and National Championships that have been won with the BIB 10 ogives is extensive, indeed. So...they obviously do work. :rolleyes: I might be quilty myself of having some hardware hangin' on my wall courtesy of the BIB 10's. ;)

That some barrels like certain configurations of bullets is hardly a .30 cal. phenomenon. But that a bullet maker would go to the lengths that R.G. does to make sure his customers are happy.... is. :)

Good shootin'. -Al
 
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