Nero wrote on Jun 24
th, 2012 at 10:21pm:
Have I been taking a chance these last thirty years with my two High Walls ?
I don't think you have been. The high wall is a totally different animal than the ballard cast frame. The steel is much better. Plus, the design is much stronger. That has been proven over and over again. Although it is possible to blow up a high wall, it takes a lot of pressure to do so. Given that you have a modern steel barrel, there should be no problems with your cartridges, given you don't go to outrageous pressures.
Your case size is also smaller in diameter than the .45-70 size that is being used with smokeless in BPCR rifles. That reduces both the hoop stress, and increases the barrel wall to hold it.
This particular unfortunate accident isn't putting out new information showing that previously known to be safe rifles aren't; it is just a reinforcement of what has been known for years and a reminder that previously known marginal or unsafe rifles are still an accident waiting to happen.
I'll summarize what I think I know about the various low strength original actions:
Stevens 44 & Ballard Cast Frame - unsafe except for .22 rf; marginal with some selected, small dia, low pressure centerfire blackpowder cartridges.
Ballard Forged Frame - Safe for BP Centerfire up to .45-90.
Winchester Low Wall - Safe for .22 rf and small, low pressure pistol class cartridges; including .32-20 and .25-20 with moderate loads.
Rolling Block #1 Blackpowder: Safe for .45-70, .50-70, and similar blackpowder loads and not recommended for smokeless equivalents.
Rolling Block #5 Smokeless: Safe for .45-70, .50-70, .50-90, .50-110 and similar blackpowder loads. Safe for 28,000 psi and less smokeless loads in .45-70 and smaller cases.
Hopkins & Allen large and medium frames: Safe for .22 lr and small pistol cartridges using blackpowder. Not safe with smokeless.
My opinion only.
dave