Results With Dutch's C434-210-RF

[VTDW]

yea but Real BOOLITS tell the story!

Here ya go Blammer

[VTDW]

Anyone hazard a guess as to what the BC of this boolit would be?

Tnx,

Dave

[WKAYE]

My guess would be around .001. Seriously though, it wouldn't be very high. Of all the GB's I've missed out on, this is the one I regret the most.

[GLL]

Anyone have one of these moulds they would consider selling or know of one that might be available?

Jerry

gllewis@pasadena.edu

[Glen]

What alloy, hardness, size and lube? It looks like you're crimping over the ogive and not in the crimp groove, correct?

[VTDW]

What alloy, hardness, size and lube? It looks like you're crimping over the ogive and not in the crimp groove, correct?

50/50 WW/Lino, 28Bhn water dropped. I ignore crimp grooves and just use the Lee Factory Crimp Die with the boolits about .005-.007 off the lands. Lube is Felix Lube with a bit of LLA added.

I have shot 20 lower end loads using .2 gr per load and 2 shot groups. Next will be the mid-range loads and finally the high end loads. I will post pics and data once completed.

Dave

[VTDW]

UPDATE on this boolit in my .444T

I have shot this boolit with VV N-120 powder all the way from the bottom loads thru the Max load and here is what I have found.

Several sweet spots with this boolit. I will ignore the lower end loads and give the middle and high end loads.

COAL 2.504
54.8 good
55.4 good
55.6* great

56.4 good
56.6* great
56.8* BEST 2,880 fps - 3 hole cloverleaf
The .444T and 200 gr hardcast 28 Bnh showed great accuracy with VV N-120 56.6 thru 56.9 with best being 56.8 gr - 2,880 fps. Higher charges resulted in less accuracy up to and thru Max of 57.7 gr. and well over 2,900 fps.
This is one sweet boolit/powder combination with great accuracy/velocity potential. My next step will be at 200 yd.

Dave

[Newtire]

I never would have thought you could push a 210 gr. boolit that fast. I only have a non-gascheck plainbase design 200 grainer. It is plenty accurate with 12 grains of Unique.

My 1-38" seems to like anything with a gas check just as fast as you can push them even to j-word velocities. The key must be the gas check and it's flat base?

[VTDW]

Dutch,

I gave up on VV N-120. It gave me mucho velocity but I never did get the accuracy I was after. Here is a target I shot Wednesday a.m. The figures are on the pic.



Dave 8)

[Dutch4122]

Nothing wrong with a 200 grn boolit at 2500 fps. Is that load MAX, or are you just starting to work with H-4198?

[felix]

Matt, it would not be Max with 4198 because he was shooting N120 at 2900 fps. 4198 and 120 are very close in burn rate, but the acceleration curve is different, making for the difference in accuracy speed. This experiment brings home the thoughts about twist rate, doesn't? It would be interesting to me to see the results using both powders at the same charges found to be best for each, but using different primers. That would modify the acceleration traces. ... felix

[VTDW]

Nothing wrong with a 200 grn boolit at 2500 fps. Is that load MAX, or are you just starting to work with H-4198?

I would have to look Dutch. I have some more of the 48.5 gr loaded as well as some under that and some at 48.7 and some at 49 for my next test.

Felix has a very interesting thought there but until I reload for several more years and learn a few more things that sort of heavy thinking stuff makes my head hurt.

I will check my load manuals tomorrow and get back to you.

Dave

[VTDW]

Dutch,

Max load for this boolit with H-4198 should be 51.2 compressed (Lee manual). I have shot in .5 gr increments up to 50 gr but skipping 49 gr and 49.5 gr. I have loaded another batch starting with 48.3, 48.5, 48.7, 49, and 49.5.

After those I might go from 50.2 thru 51.2 and see how that goes. I might, but doubt I can find another sweet spot going up in the load. Anyhow, Max load (51.2c) most likely would not gain me much more than another 100 fps over the 48.5 gr.

I will let you know how it turns out. Thanks again Dutch for such a sweet boolit that is looking very promising for higher velocities and accuracy with my .444T because I want to give it a go out to 200 yd and past.

BTW Felix, the N-120 gives a MUCH sharper recoil with comparable loads than the H-4198 with my rifle.

Dave

[felix]

Should compare recoil only when velocity is about same at muzzle. Even then, I would expect N120 to be somewhat faster than 4198 with that straight case and bore size, making the recoil much sharper. Sharper recoil implies the need for a shorter barrel for the same accuracy as a longer barrel, but only when using a harder boolit to compensate for the sharper thrust. Very hard to substantiate this with any factory gun because of their excessive tolerances, but use as a general rule when having the same gun/caliber in different barrel lengths. ... felix