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Jerry,IMR 4350 is the universal powder for the 243 and it's best for all bullet weights from 75 grs and up.Sometimes a rifle will shoot best with deep seated bullets. The 55 gr and 58 grs are examples in the 243. Try some various depths suggested by the manuals.
Jerry,
IMR 4350 is the universal powder for the 243 and it's best for all bullet weights from 75 grs and up.
Sometimes a rifle will shoot best with deep seated bullets. The 55 gr and 58 grs are examples in the 243. Try some various depths suggested by the manuals.