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Leftoverdj · February 15, 2006, 10:34 AM

Cobra, the Lyman Cast Bullet Handbook has not had a major revision in many years. If you have a copy of Lee #2, read chapter 10. It covers a lot of stuff that was not known when the Lyman Book was written.

You haven't mentioned what diameter you size to. Microgroove barrels notoriously prefer oversized bullets. If you are sizing to .308, I'd expect a major accuracy improvement from crimping the GC on with a .311 die. This leaves the bullet as cast. That was .309 or a bit over from the two of those moulds I have owned and may still be a bit small.

I've had excellent results from that bullet in a series of conventionally rifled .308 Win.

February 15, 2006, 10:34 AM	#5
Leftoverdj Senior Member Join Date: October 15, 2004 Posts: 934	Cobra, the Lyman Cast Bullet Handbook has not had a major revision in many years. If you have a copy of Lee #2, read chapter 10. It covers a lot of stuff that was not known when the Lyman Book was written. You haven't mentioned what diameter you size to. Microgroove barrels notoriously prefer oversized bullets. If you are sizing to .308, I'd expect a major accuracy improvement from crimping the GC on with a .311 die. This leaves the bullet as cast. That was .309 or a bit over from the two of those moulds I have owned and may still be a bit small. I've had excellent results from that bullet in a series of conventionally rifled .308 Win.