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Old November 26, 2012, 05:40 PM   #34
Senior Member
Join Date: April 4, 1999
Location: New Mexico
Posts: 1,884
My favorite powder is IMR 4350 behind a 100 gr bullet. Velocities are slightly over 3100 fps from a 22 inch M70 FWT pre 64.
Factory loads often run about 2900 fps which takes it down in effectiveness a lot.
My loads exceed handbook loads by 2-3 grains so I won't post them. However, when the .243 WCF first came out the writers used 45 gr of 4350.

I have not found any pressure problems. I have worked up loads with 4350 in my rifle that exceeded 3200 fps with 100 gr bullets. I know pressures are high, but do not get hard bolt lift or problems with primers showing too high.
My rifle is a "fast" rifle, and I have never found another that can reach such velocities. I had a friend who had a Sako, and he had difficulty getting over 3000 fps from his rifle.

In my view any powder faster than 4350 can not get the velocities I want in a .243.

I tried H 4831, but the case would not hold enough. Norma 204 is the same burning rate as 4350, and is more dense.
I have not used any of the newest powders, but if you stay with a burning rate of 4350 or slightly slower, if the case will hold it, performance will be fine.

Ecclesiastes 12:13  ¶Let us hear the conclusion of the whole matter: Fear God, and keep his commandments: for this is the whole duty of man.
14  For God shall bring every work into judgment, with every secret thing, whether it be good, or whether it be evil.
JerryM is offline  
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