The second link I posted states within that article that Remington has the max charge for BH209 at 150 gr volume.
It begs the question then, why, after all this time of testing by Western and Remington/Barnes, hasn't the load data been published by either Western or Remington? The RU is in its 3rd year out and BH has been out even longer.
There's no documentation in either the Remington Ultimate manual or on the Blackhorn site. Is Remington and Western relying on a compensated outdoor writer to provide the data?
I'm not suggesting that either the RU or UF rifles won't ignite BH209,
they BOTH will. BOTH rifles are built with much stronger actions and barrels, which are capable of handling charges well above what mass produced production rifles are capable of safely. The question is, why hasn't Remington included it in the rifle's manual or, Western published the data? Especially when BH209 has become such a popular BP substitute?
Could it be that the nitrocellulose composition of BH209 and the long term affects on the flash hole and nipple are really not known at this time? Could it be that Remington would much rather have a rifle sent to them for breech plug replacement, so that the head space can be set properly, than the owner replacing it themselves (warrantee costs)?
Then another question........ why did the inventor (UF Inc.) of the breech plug, the same breech plug as in the RU short of a hardening difference, remove BH209 from its list of approved BP substitutes?
In reality, I don't honestly believe that there's another person who would prefer shooting BH209 more than myself. I've shot many thousands of rounds of BH through production rifles. BH has a lot going for it, because its consistent in size/shape and can actually be weighed...
using the conversion provided by Western only. It doesn't leave crud rings, in most cases (short of extreme accuracy) there is no swabbing necessary between shots.
I shoot and own the big brother to the RU, the BP Xpress. Like everyone else, I wanted to shoot BH through the rifle, for many of the reasons above. After shooting 3 containers, I found my breech plug was completely gas cut and required replacement. Replacement wasn't as easy as just removing the 2 piece breech plug (the RU is 2 piece also). I took it to UF Inc., who removed the barrel from the action, placed the barrel in a lathe and drilled out the gas cut and burned breech plug. Once that procedure was completed, then the head spacing of a new breech plug was necessary, the barrel and action put back together and a blunt warning about shooting BH, a nitrocellulose propellant in the rifle.
Maybe Remington, by not publishing the data in their rifle's manual, is taking the advice of the breech plug inventor?
There's a reason both rifle manufacturers post the acceptable BP substitutes in their manuals. It'll be interesting if Remington includes the data and what their warrantee costs may do. The RU will shoot just as accurately and to the same ranges using their recommended propellants, as it will shooting BH209.