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440 Posts
Hello all,
My question involves more of a headspace matter than the actual ammo(blanks) matter so i hope it makes sense in the Semi auto forum.
I am running a McGuire built Semi 1919a4 in 7.62x51. As a reenactor I have been running the German plastic 7.62x51 blanks bought from Tony gunsmith for years. My weapon has been headspaced accordingly for these blanks when using my blank adapter. I have a front cartridge spacer that is adjustable via a set screw and spring which eases forward or back according to the length of the blank.
I just came upon a ziploc bag of 200 Austrian blanks headstamped HP 91 L31A1 that i'd like to get rid of at a small public WWII demonstration coming up.
My question is, I have seen threads on here discussing live ammo headspacing consistently, but very few threads dedicated to blanks. Of the ones i found, most seem to mention the German plastic blank which i am already set up for. So, if i switch out to this slightly shorter blank I know i have to adjust my front spacer on the BHP bracket to accommodate it. But what about the headspacing. I have to perform headspace outside the weapon because I filled the hole on the Israeli LSP to make it look USGI, thus that hole won't allow the barrel lock spring to move inside the receiver with the little wrench i bought on here.
Right now i believe i am running my plastic blanks 3 clicks from the point when the bolt first closes into battery.
Are the concerns as great for headspace with blanks as with live ammo ?
I read in one thread that someone was operating their German plastic blanks 5 clicks out..... i'm just confused now
Has anyone swapped blanks manufacturers often enough to have advice on headspacing ?
an easy fix is just to use the plastics at this event, but they are dedicated to tacticals as I have 20,000 of them. for this lot of 200 Austrian i just want to have done with them and fire them off at this public display, thus my concern....:help:
Thanks for any help and or recommendations.
Cheers,
Andrew
My question involves more of a headspace matter than the actual ammo(blanks) matter so i hope it makes sense in the Semi auto forum.
I am running a McGuire built Semi 1919a4 in 7.62x51. As a reenactor I have been running the German plastic 7.62x51 blanks bought from Tony gunsmith for years. My weapon has been headspaced accordingly for these blanks when using my blank adapter. I have a front cartridge spacer that is adjustable via a set screw and spring which eases forward or back according to the length of the blank.
I just came upon a ziploc bag of 200 Austrian blanks headstamped HP 91 L31A1 that i'd like to get rid of at a small public WWII demonstration coming up.
My question is, I have seen threads on here discussing live ammo headspacing consistently, but very few threads dedicated to blanks. Of the ones i found, most seem to mention the German plastic blank which i am already set up for. So, if i switch out to this slightly shorter blank I know i have to adjust my front spacer on the BHP bracket to accommodate it. But what about the headspacing. I have to perform headspace outside the weapon because I filled the hole on the Israeli LSP to make it look USGI, thus that hole won't allow the barrel lock spring to move inside the receiver with the little wrench i bought on here.
Right now i believe i am running my plastic blanks 3 clicks from the point when the bolt first closes into battery.
Are the concerns as great for headspace with blanks as with live ammo ?
I read in one thread that someone was operating their German plastic blanks 5 clicks out..... i'm just confused now
Has anyone swapped blanks manufacturers often enough to have advice on headspacing ?
an easy fix is just to use the plastics at this event, but they are dedicated to tacticals as I have 20,000 of them. for this lot of 200 Austrian i just want to have done with them and fire them off at this public display, thus my concern....:help:
Thanks for any help and or recommendations.
Cheers,
Andrew