30 br

J

Johnnie from KY

Guest
I would like to get my 30 shooting better. I am wondering about a few things (I would like to shoot in a match on saturday so I am limited on time.) What kind of seating depth do they like most of the time? I have several different bullets, powders (4198,n130,and some late 80's 4198) chamber is 330 and bushing is 325. Last time I shot this gun was a year and a half ago, and i shot 34 grains of 4198 and Fowler 117. It shot pretty good but not as good as you all talk about. Thanks for all the help, Johnnie
 
30br

It is a 17 twist, Kosty barrel, panda action, .040 freebore, 22 1/2 in. long
 
That's very nearly the same set-uo that I shoot. I am using a 18 twist Broughton, 34.5 gr.H-4198 or 33.8gr TU-2000 and a Bib 118(10) ogive bullet. I am using Wolf srmp's and the bullet is as far in as neck tension will allow. The only difference is my chambers are -0- freebore. I would look at the bag set-up if it flips shots; that is to say it throws a shot that is out of the condition. If it throws a shot and then goes back to where it was originally I'd try another scope on it. I'm assuming its a VFS rifle. Have someone you trust have a look at your gun handling in the bags. If the rifle is straight and square I see no reason it shouldn't shoot. What problems are you having with it??

Mike Swartz
 
H 4198, 34.0 gr. give or take .1, .330 neck turned .002 under 0 free bore, just touch the lands them back off .010, Fed 205M, 17 twist HV Krieger @ 24”, hand built Walnut stock pillar bedded and bolted in, Std. 7 ogive 118gr. bullet made from Blackmon dies on 1 inch J-4 jackets. It shot sub .2 in groups from day one even fire forming the brass, haven’t changed a thing and never looked back, that was 3 years ago. I think that it is the bag set-up and the external equipment that is more critical to your accuracy than a load for this cartridge, the gun should hammer in on the first round and return to battery every time. I shoot bare bullets and find that when I clean after 50 rounds is no different than after 15, so now I can shoot an entire match (1 yardage) before cleaning. Your Fowler’s are 7 ogive .

Rick
 
In spite of all the testimonials, Mike asked the question: How does it shoot? For one, does it shoot as good as your PPC?

And have you tuned YOUR gun, or just taken someone else's numbers (charge, jump, bullet, etc.)

And finally, not all barrels are equal. There are a lot of 6-PPCs out there that are .250 rifles, but if you only look at the winner's list, you wouldn't know it.

(with reference to the last posters "recipe": Al Nyhus uses a rather different recipe, lots of jam, lots of neck tension, lots of clearance between the case & the chamber neck . The point isn't that you should try Al's recipe, because it isn't really a recipe anyway . . . it is something he worked out with his rifle.)

So what size groups (or scores) are you getting with your .30 BR?
 
Johnny, my 'baseline' for working with my 30BR stuff is H4198, a bunch of neck tension (.004 under what a loaded round measures), a good amount of jam (.025-.030 from 'just touching'), Fed 205M and either a BIB 118-7 or lately my own 117's. My barrels are all twisted 1:17. As for neck clearance, .002 is a good place to start..but one of my Kostyshyn barrels just really came alive after I opened the neck clearance to .004. I don't recommend doing this from the start, but it does show just how individual some barrels are. Seating depth falls into this same area.

When it comes to bullets, my belief is that bullets is one area that more 30BR shooters should experiment in. Even though all of the commonly available BR .30 cal. bullets are great (BIB, Cheek, Euber, 10X, etc.), some barrels simply like a particular bullet more than others.

I have several brands of .30 cal. bullets here, as well as the ones I make, and use them during testing to see whether a certain combination shows the same 'trends' during tuning.

Good shootin'. -Al
 
Hi Johnny,

I start with a jam of about 15. Shoot a group or two, then shorten and lenghten .005 at a time to see the changes.

Adrian
 
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