August 10, 2008, 12:19 AM
OK. I have cast some nice Lee C312-185-1R. The have be lubed with LLA, Size with a Lee Sizer .311 with gas check. I am going to use Harris's "The Load", i.e. 13 grain of Red Dot. I used 50% wheel weights and 50% linotype with the bullet dropped immediately into water.
I have 2 questions.
1.What should be my overall length? If I crimp on the first groove the OAL is around 2.9". On the second groove it is about 2.7".
2. How much crimp is suggested?
August 10, 2008, 02:30 AM
With Lead bullets in manually operated bolt-action rifles, I am a believer in the Lead bullet being thrust into the lands, at least a little bit. I am also a believer in the bullet being sized to fill the throat, which is usually a shade larger than the groove diameter, but may be much larger. If the throat diameter is smaller than the groove diameter (I've encountered this twice), expect lots of Leading. Also, if the bullet is smaller than the groove diameter, expect lots of Leading, especially if you use slower rifle powders.
I am also a believer in hard cast bullets, and water-dropped wheelweights with a bit of added Tin from something such as Linotype produces about what I am looking for.
I've used this bullet in both the .303 British and the 7.62x54R. I have not crimped, even in autoloaders. If you have adequate neck tension, crimping is not necessary. Just straighten out the belling necessary to get the bullet into the case.
An M38 may have a groove diameter quite a bit larger than .311". It would be really good to know what your groove diameter was.
Regarding the Lee .311" sizer, Lead bullets probably will spring back a little bit, so your bullet diameter may well be .312" or so.
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