The 257 Roberts probably will not be produced in 2019. The list of “What will not be produced” has not been released yet which translates into what will be made available is not known and as always vague at best. My rational is that the Roberts case is marked as seasonal and availability in 2018 was good and supplies are now diminished.
As of time of this article 30-40 Krag, 300 RUM, 35 Whelen, 222 Remington Magnum and 300 SAUM are now being sold here at duckcreeksportinggoods.com. The supply of the Remington Magnum will be short lived, the other three my guess is at least into the spring. It is only a guess and once supplies are gone one can expect at least a five year drought if Remington follows the production schedules they used in the past
450 Bushmaster, 250 grain bullets
A project I have been working on is developing a load for a 450 Bushmaster. The barrel I used to assemble the upper is a Bear Creek Arsenal 16 inch that has a 1 in 24 inch twist. The brass is Starline and the bullets are the Rainier 250 grain .452 dia Flat Point. Cartridge overall length 2.25 inches.
Original testing was with Hodgdon Lil’Gun. Hodgdon’s Manual list a starting load of 25.2 grains, Lyman #50 lists a starting load of 34.0. Both produced a under gassed round. A powder charge of 36.0 grains demonstrated that the action was cycling but not really effectively ejecting the spent case and had several stove piped unless the rifle was fired with one round in the magazine..
Investigation into the gas system revealed a gas port of .070 inch. Several inquiries with Bear Creek revealed they to experienced a lack of gas issue and later barrels being manufactured wit .076 inch gas port. Later trips to the range with the barrel modifications produced better results with the 36.0 grain charge only.
I finally have success with a functioning rifle. Two changes was made, the gas port was enlarged to .082 inches and H-110 powder was used, still shooting the Rainier bullets. Powder charge of 38.5. This round shot consistent and had zero cycling problems with the 50 founds fired at the range that day Average velocity measured 2068 fps, max spread of 81 fps
Later test will be conducted with lighter loads and revisit the use of Lil’Gun powder.
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