I have looked all over for a specific mention of the proper thread form for the Sear Model 51L made by Husqvarna. I have pitch and diameter, but what is the form 55 or 60 degrees?
I have looked all over for a specific mention of the proper thread form for the Sear Model 51L made by Husqvarna. I have pitch and diameter, but what is the form 55 or 60 degrees?
Probably 55 degree Whitworth.
Do you have a thread pitch gage?
If you do hold it in your the threads of the barrel stub , if you see light it is not 60*
I cut the threads a 55 degrees, all seems well. Thanks for everyone's help! I chambered it today. It still needs bluing so I'll do a Mark Lees rust brown (really black if boiled). The step after that is getting the trigger guard refinished. It will probably get a ceracote or one of the other tough spay on finishes.
BP | Bronze Point | IMR | Improved Military Rifle | PTD | Pointed |
BR | Bench Rest | M | Magnum | RN | Round Nose |
BT | Boat Tail | PL | Power-Lokt | SP | Soft Point |
C | Compressed Charge | PR | Primer | SPCL | Soft Point "Core-Lokt" |
HP | Hollow Point | PSPCL | Pointed Soft Point "Core Lokt" | C.O.L. | Cartridge Overall Length |
PSP | Pointed Soft Point | Spz | Spitzer Point | SBT | Spitzer Boat Tail |
LRN | Lead Round Nose | LWC | Lead Wad Cutter | LSWC | Lead Semi Wad Cutter |
GC | Gas Check |