I normally shoot my 7.62x39 with jacketed bullets in Lapau Brass. I neck size them using a LeWilson die. I want to shoot some reduced cast loads indoors at 25 yards. I have done this before with this rifle but I normally full length resize and flare the case mouth with a Lyman M die.
I was wondering what if I just open the fired case neck with the Lyman M die and seat the bullet with out resizing the case. Any thoughts any one.
Neck sizing and cast boolits question
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All handloading data posted on Full-Bore UK from 23/2/2021 must reference the published pressure tested data it was sourced from, posts without such verification will be removed.
Any existing data without such a reference should be treated as suspect and not used.
Use reloading information posted here at your own risk. This forum (http://www.full-bore.co.uk) is not responsible for any property damage or personal injury as a consequence of using reloading data posted here, the information is individual members findings and observations only. Always verify the load data and be absolutely sure your firearm can handle the load, especially older ones. If in doubt start low and work your way up.
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dromia
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Re: Neck sizing and cast boolits question
How much smaller is the inside diameter of the fired case than the diameter of the boolit?
I would be surprised if it was smaller, most boolits/bullets will just drop into a fired case so usually need sizing.
You on the whisky again Dave?
I would be surprised if it was smaller, most boolits/bullets will just drop into a fired case so usually need sizing.
You on the whisky again Dave?
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Re: Neck sizing and cast boolits question
I am out of Whisky at the moment Adam. Anyway I wonder if it's because these cases have been used with cast loads before but no the boolit does not drop in the case they seat to the first lube band and I can not push them in by hand hence my question.
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dromia
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Re: Neck sizing and cast boolits question
I'd still neck size Dave so that you have some decent neck tension.
In these larger cases with small amounts of fast powder you want to ensure that the primer flash finds the powder before the boolit starts moving so as to ensure a good consistent burn.
In smaller case like the 310 cadet with better case fill this isn't an issue and immediate powder ignition is more certain so you can get away with hand seating. Not something I'd do with the larger cases/small amounts of fast powder as it could lead to erratic velocities.
In these larger cases with small amounts of fast powder you want to ensure that the primer flash finds the powder before the boolit starts moving so as to ensure a good consistent burn.
In smaller case like the 310 cadet with better case fill this isn't an issue and immediate powder ignition is more certain so you can get away with hand seating. Not something I'd do with the larger cases/small amounts of fast powder as it could lead to erratic velocities.
Come on Bambi get some
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Analogue Good Digital Bad
Fecking stones
Real farmers don't need subsidies
Cow's farts matter!
For fine firearms and requisites visit
http://www.pukkabundhooks.com/
Re: Neck sizing and cast boolits question
I will neck size them then expand the neck to be on the safe side.
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