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compass will
09-19-2008, 03:58 PM
I have the bator mold for my 22-250. I was shooting H4895. With Hodgdons advice, I took the max load of H4895 times .60 and came up with this:

36.5 x .6 = 21.9 grains.

Boolit is bator, cast from lead that came from a box of "hunters hard cast" that I melted down. these were water dropped.

so I load a bunch of them up between 21.5 and 23 grains. They shoot real bad groups (10" at 100 yards). I found no lead in the barrel when I cleaned it.

so I usethe formula in Lee's book where you take the top loads speed X .9746, to see the speed of reducing the load by one grain. then take that answer X .9746 to see an additional 1 grain reduction speed. (I made this out in excel with formulas).

My answer shows that 21.5g = 2559 fps and 23g = 2650 fps.
My results also show that if I want to shoot at 2100 fps I should be running around 14.5 grains.

My question is 14.5 grains is only 40% of max load, not the 60% Hodgdon said was ok to use.

What should I do? Switch to a different powder? Try the 14.5 grain of h4895?

The powder I have at home is:
H4895
H4198
Vargent
Clays
Trailboss

Really would like to make this work. Not worried about noise, just want to make this 22-250 shoot cast.

felix
09-19-2008, 04:10 PM
Use 4198 at 18 grains. Report back, after working DOWN for a sweeter spot if necessary. ... felix

compass will
09-19-2008, 04:39 PM
Use 4198 at 18 grains. Report back, after working DOWN for a sweeter spot if necessary. ... felix

The H4198 I have, or the IMR4198?

edit: The reason I ask is sundog tried imr4189 and I don't think they are the same powder.

johnly
09-19-2008, 05:57 PM
I've used Trailboss in my 22 Hornet with the same bullet and got good results.

John

compass will
09-19-2008, 06:04 PM
I am willing to try trailboss, but I don't want to blow my gun (or myself) up experimenting.
the 22 hornet case holds .79cc and the 22-250 holds 2.75cc. Does all the extra air space cause problems with pressure?

felix
09-19-2008, 06:12 PM
Extra air space is not conducive to accuracy. Once you find a load with a fast powder, it will not be the same the next day unless you can make that extra space consistent. 4198s are lot dependent like other powders as you know by now by reading this board. Use the version you have at 18 grains for a starter. Should be between 2100-2400. ... felix

runfiverun
09-19-2008, 09:40 PM
if the air space bothers you. a bit of filler will fix that, it will also take the place of a few grains of powder.
notice the range felix gave for velocity????
you will have that,,, with powder lots and cast boolits.
you gotta try it and see what you get. [chrono]
i have had loads that i thought would give near 1900 and got 1650.
ive had the same thing the other way. conservative isn't just a political thing it is a good thing with firearms and loading.

compass will
09-21-2008, 07:57 PM
Well the 4189 was much better. I started at 17.8 grains (It was late, so I used the Lee disk powder thrower and that is what the disk came out to).

first couple shots were a real good group (about a dime size at 25 yards), then it got worse. After 25 rounds at 17.8gn I switched to 16.5. Went to clean the barrel first and found it was leaded up. Then I broke my cheep .22 cleaning rod and never got to clean the barrel so I put it away. Anyway, we are on the right track.

thanks so far everyone.

w30wcf
09-21-2008, 10:46 PM
When I shot cast in my .22-250 some years ago, 23 / 4198 shot very well under a NEI 55 gr. linotype bullet. Velocity was close to 3,000 f.p.s. and groups ran around 1 1/4" average at 100 yards. :mrgreen:

w30wcf

quack1
09-23-2008, 09:52 AM
Will, I agree with runfiverun-you have to try and chrono to see what YOUR gun says. I just finished a bunch of shooting with my 22-250- Lyman 225462, 56gr, acww, run through a .228 sizer just to lube and seat the check. The velocity changes for one grain of powder, that I chronographed, are quite different than the Lee formula you mention. With IMR 4895 I got about 30fps difference and Lee formula says 17fps; IMR 4198 gave me 150fps, Lee says 96fps; 2400 gave me 125fps, Lee says 59fps; Imr 3031 gave me 125fps, Lee says 71fps. These are for my gun and the lots of powder I have and yours may be different. The point is formulas may get you close, but it is best to chrono your loads in your gun.
If it is any help, the best powders I tried were 3031 and 2400.

compass will
09-23-2008, 01:03 PM
I thought I was going to have the chance to chrono them Sunday.

one of my friends at the range set up this brand new CED chrono his wife gave him.
Last time he tried it he was getting "error" on the screen so he bought the ILED tops that use infered light. He set it all up, walked back to the bench, I looked over at it and IT WAS ON FIRE! one of the LED tops must have had a dead short, it melted the battery pack, the wire harness, even welded the connector into the side of the upright that supplies the power to the LED top.

Oh well.

Larry Gibson
09-24-2008, 12:16 AM
Start at 16 gr of H4895 with a 1/2 gr dacron filler over the powder and work up in 1/2 gr increments until accuracy goes south. Will be helpful to chronograph also. Pleae report back what you try and the results along with info on the rifle and scope.

Larry Gibson

compass will
09-28-2008, 07:21 PM
Jury is still out, but H4895 out shot H4198 by 100%

16 grain H4895 = 10 into 2" at 50 yards. 18 grain opened up. I will try somewhere between.

16 grain H4195 = 10 into 4" at 50 yards. 18 grain opened up and left silver specs in barrel while cleaning.

Anyway. I am using an old Weaver 3.5 scope with a real heavy center post. In fact the post covers 2" at 50 yards. All my other scopes are useless.