Greetings.
My first obvious knowledge gap is this: if a guy wants to shorten a parent case approximate 0.300" what would be the recommended way?
Specifics:
-End Goal: shortened 300 Norma Mag 40 degree Improved (can have longer neck, just need shoulder neck junction shortened)
-Parent case 300 Norma Mag
-Push neck shoulder junction back approximately 0.300"; partially accomplished by unconventionally 40 degree improving (keeping same body length and increasing neck length as opposed to maintaining neck-shoulder junction and blowing out body & shoulder) and partially by shortening body.
Considerations:
-I have the AMP annealer and tools for length trimming and neck turning. I do not have an neck reaming tools, but have entertained picking them up if I attempt this project and they seem required (my first attempt would be to only turn the necks and avoid donut dangers by designing case & chamber so that bearing surface of the bullet is no where near the donut zone....hence the shortening of the parent case).
-I am already anticipating custom reamer, custom sizing die....not sure what route to take (Whidden custom from reamer print, Whidden custom from fired brass, some other die blank turned with my reamer?)
And in case I overlooked it, does an equivalent length magnum cartridge already exist (0.588 head, approximately 2.200"-2.300" case OAL, approximately 90gr H20 capacity)?
Thanks in advance for taking the time to share knowledge.
My first obvious knowledge gap is this: if a guy wants to shorten a parent case approximate 0.300" what would be the recommended way?
Specifics:
-End Goal: shortened 300 Norma Mag 40 degree Improved (can have longer neck, just need shoulder neck junction shortened)
-Parent case 300 Norma Mag
-Push neck shoulder junction back approximately 0.300"; partially accomplished by unconventionally 40 degree improving (keeping same body length and increasing neck length as opposed to maintaining neck-shoulder junction and blowing out body & shoulder) and partially by shortening body.
Considerations:
-I have the AMP annealer and tools for length trimming and neck turning. I do not have an neck reaming tools, but have entertained picking them up if I attempt this project and they seem required (my first attempt would be to only turn the necks and avoid donut dangers by designing case & chamber so that bearing surface of the bullet is no where near the donut zone....hence the shortening of the parent case).
-I am already anticipating custom reamer, custom sizing die....not sure what route to take (Whidden custom from reamer print, Whidden custom from fired brass, some other die blank turned with my reamer?)
And in case I overlooked it, does an equivalent length magnum cartridge already exist (0.588 head, approximately 2.200"-2.300" case OAL, approximately 90gr H20 capacity)?
Thanks in advance for taking the time to share knowledge.
