For those who have made cases for 300W, do you have a preference in parent cases ? Do you choose Commercial or Military ? I weighed one SSK casing that was 84gr. Do your cases mirror that weight ? Mine are to be used in a TC Contender 10'' (SSK barrel). Did you anneal ? Did you need to ream necks ? Thanks.
Forming 300W / 300BO from .223 / 5.56
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- Last Post 28 October 2019
For those who have made cases for 300W, do you have a preference in parent cases ? Yes Do you choose Commercial or Military ? Military Lake City (LC) from one year production run I weighed one SSK casing that was 84gr. Do your cases mirror that weight ? Don't know Mine are to be used in a TC Contender 10'' (SSK barrel). AR 15 build Did you anneal ? No Did you need to ream necks ? Not necessary for my chamber Thanks.
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For those who have made cases for 300W, do you have a preference in parent cases? - Not really, whatever I have that is one lot number and I know the number of times they have been fired.
Do you choose Commercial or Military? - Lot numbers, a large enough sample whether commercial or military that I have some extra to use setting up I prefer commercial, but good military brass is acceptable..
I weighed one SSK casing that was 84 gr. Do your cases mirror that weight? - uniformity of weight, say +/- 2 grans, is more important than weight. Some military issue bras will come very close. others will not.
Mine are to be used in a TC Contender 10'' (SSK barrel). - Factory chamber? Setup using the chamber to assure headspace is tight, but the T/C ill close easily.
Did you anneal? - Always is more than two calibers difference. I once worked .348 Winchester to .50-110 WCF which cured me from buying calibers I cannot make in one pass in the sizing die.
Did you need to ream necks? - No. The reamer will follow the least resistance in the hole and not even out the neck walls. When needed, I outside neck ream since this removes the high spots.
Farm boy from Illinois, living in the magical Pacific Northwest
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