.243 Winchester Cast Boolits Loads

[terryt]

Hi:

I am looking for some cast boolits loads for 300-400 yards for the .243 Winchester. Can anyone tell tell me what the bollit drop would be as well as some info?

Thanks,

Terryt

[waksupi]

Have you tried the search function? I seem to recall some info in there.

[quilbilly]

You never mentioned size of boolit, powder, or velocity. I am shooting a CB dropped from an old Ideal/Lyman mold in a 6mm rem with 16 gr of 4759. The MV is about 1950 fps. It is still early in my experimenting but it seems quite accurate at 100 and 200 yards so far.

[MT Gianni]

I get great accuracy withthe 243 @ 1600-1700 fps and a 95 gr RCBS bullet. I have never shot it over 100 yards and GUESS that drop would be well over 40" @ 400 yards from the 100 yards load. I GUESS again that there might be at least 24" difference between 300 and 400 yards. The difference betwenn the cast and jacketed loads in my rifle @ 100 yards is 11".

[Carolina Cast Bullets]

In order to calculate the "drop" or +/- to "line of sight", you would need the ballistic coefficient of the given bullet. It may or may not be posted on the data page or the specs page for that bullet.

The ballistic coefficient is a number that refers to the "sleekness" (cant think of a better word) of the bullet as it moves thru the air. The higher the B/C, the "sleeker" the bullet and the less it is effected by air friction, and thus, "drop"

[Wally]

I was out a few weeks ago shooting my .243 Rem 700 with the RCBS 95 SP-GB bullet at 1,700 FPS muzzle velocity--my target was a 4" wide steel plate. Started at 250 yards--moved to 300 then 400. At 400 I hit it 20% of the time. The drop from 300 to 400 yards was 3.5' (42 inches)...the scope was zeroed at 300 yards. The plate was suspended on a cable with a sand hill as a backstop---I coudl easily see the misses from the impacts in the sand. Very enjoyable to shoot that far...I only do so when there is little or no wind.

[terryt]

Hi All:

Thanks for all of the info.

Terryt

[Wally]

Hi All:

Thanks for all of the info.

Terryt

BTW to obtain the optimal accuracy with cast bullets in this caliber. it is best to seat the bullets so they touch/engage the rifling (leade) . This may mean you will have to load single shot and leave some of the grease grooves exposed....ditto with any .22 Caliber cast load that I have used. Also, it helps to chamber the round..raise the rifle in the air and slowly lower it...this positions the powder the same way with each shot. It sounds goofy, but it works.

[Marlin Junky]

Here's the trajectory, etc. calculator I play with:

http://www.jbmballistics.com/cgi-bin/jbmtraj-5.1.cgi

MJ