Final Results: It seemed the long flat at the base of the brass was too much. Using the 300wsm dies worked great for the first few firings but then it was too hard to chamber the rounds. Also hard to eject rounds and gave a false feeling of pressure signs. Learned a lot and had some fun. On to the next project.
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Couldn't sleep Christmas Eve so I went out to the shop and built my 35deg 300 rum hybrid.
Goal: make a cartridge that would compete with the 300norma improved while using 300 rum brass.
Components
Trued Rem 700 action
27" brux Rem varmint contour (deep fluted by Kampfeld customs)
Manners eh5 in midnight camo
Vortex hst 6-24 mrad
I will get a good print made up. Imagine a 300wsm the length of a rum. It adds a 35deg shoulder and a flat from the base to the .74" mark in the chamber. The base and shoulder diameters are slightly larger. It allows for an extra 4% capacity over the standard rum with basic computations, but I haven't finalized the using Gr of water.
Initial testing today with a light load of 78gr imr4350 and 180sst in Norma and nosler 300 rum brass printed the below groups at 100 and 300 for fireforming. The brass ff with no issues and showed decent accuracy for a basic ff load.
Next: load up 230 otm and h1000 or N570 to see where pressure begins with the increased volume case. I'll chrono the ladder and post.
Pardon the colors, I have a bird nest in my shop heater and cannot cerakote till I get my shop heater fixed. Thinking a graphite or charcoal color with orange or red flutes
_________________________________________________________________________________________________________________________________________
Couldn't sleep Christmas Eve so I went out to the shop and built my 35deg 300 rum hybrid.
Goal: make a cartridge that would compete with the 300norma improved while using 300 rum brass.
Components
Trued Rem 700 action
27" brux Rem varmint contour (deep fluted by Kampfeld customs)
Manners eh5 in midnight camo
Vortex hst 6-24 mrad
I will get a good print made up. Imagine a 300wsm the length of a rum. It adds a 35deg shoulder and a flat from the base to the .74" mark in the chamber. The base and shoulder diameters are slightly larger. It allows for an extra 4% capacity over the standard rum with basic computations, but I haven't finalized the using Gr of water.
Initial testing today with a light load of 78gr imr4350 and 180sst in Norma and nosler 300 rum brass printed the below groups at 100 and 300 for fireforming. The brass ff with no issues and showed decent accuracy for a basic ff load.
Next: load up 230 otm and h1000 or N570 to see where pressure begins with the increased volume case. I'll chrono the ladder and post.
Pardon the colors, I have a bird nest in my shop heater and cannot cerakote till I get my shop heater fixed. Thinking a graphite or charcoal color with orange or red flutes
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