I have never used BB in my GG, but I have used Randy Garretts 540gr hammerheads with out a problem. If I were you I would contact BB via e-mail and ask them. The picture your gunsmith showed you may of had an obstruction in the barrel. I don't see any warnings on BB website not to used this ammo in SS rifles.

http://www.buffalobore.com/index.php?l=page_view&p=contact_us

BB has a reputation for being pretty hot loads. Just take a look at federals 45-70 loads compared to BB's.

http://www.federalpremium.com/products/details/rifle.aspx?id=42

http://www.buffalobore.com/index.php?l=product_list&c=35

They are pushing 430gr loads faster than federals 300gr load! Assuming same barrel length, etc...

Could this cause rupture in a Marlin 1895? I don't know. But I might check with Marlin customer service first....

heres an example of what can happen using buffalo bore. Gun was brand new. So yes they are definately loaded hot.

Preview	Attachment	Size
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What load was it? Buffalo Bore offers standard pressure and +P loads, and that looks like an Uberti 1873.

I have used Buffalo Bore ammo in a Ruger Bisley 45 LC with no problems. It is a hot load and take seriously their warnings on what firearms they should be restricted to!! That picture is of a firearm BB says NOT to use their loads in! The Marlin lever actions should be safe for the BB loads, according to BB reccomendations.

A few folk at the Marlin owners forum use the BB Loads.

I wrote an article on bullet frontal area versus terminal performance a while back and used the .45-70 as a part of the research. The article has plenty of autopsy pics to study:
http://www.ballisticstudies.com/articles/meplat/meplat.html

ex, you are correct it is an uberti 1873. As far as the load goes, the customer said it was a standard pressure load. But, its hard to tell with some people. You could always try it and if it doesnt work out you can do the same as this guy, just take it back to the store you bought it at.

A couple weeks ago I was looking at mostly empty shelves to see what ammo had come in (like shopping for shoes in the Soviet Union), and a guy asked me what kind of ammo he should buy for moose hunting. I said that depends, and asked what kind of rifle he had. He responded, "A Savage, I think." I winced, and then gently asked what caliber. He said he wasn't sure, but thought it was a "300 something."

Needless to say, I could only imagine the guy taking that level of knowledge into the Alaskan bush -- which can kill you in more ways than any other place in North America. I can only hope he has a friend to take him under his wing and teach him a few things before September.

I've met a lot of people like that in the gun section lately -- maybe it's because people who weren't sure about buying guns are now buying them. So I think it's entirely possible that the customer with the Uberti assumed that all .45LC ammo is "standard pressure" because it's all .45LC. If it was higher pressure, it'd be a .46 or .47, wouldn't it?

Again, you are correct again ex. Well as it sounds right now this shouldnt be a problem much longer as now apparently there are more guns availible than ammunition. But, that is another subject.

I have used Buffalo Bore ammo for years in my 1895G with no problem. I've got a box of .405gr in my rifle case right now ready for deer season.

My son-in-law lives in Fairbanks AK and has used Buffalo Bore exclusively in his stainless 1895 for several years based on my experience with this quality ammo.

I'm also a professional welder by trade. Tell your guy to take a class in metallurgy. That stainless barrel is equal to and may actually be harder than the standard steel barrels manufactured by Marlin. I know that the stainles blanks go thru a much better quality control process. Want to know for sure? Ask Marlin...they'll know if there is a problem with a certain type of ammo and I'm sure they would tell you not to use it if it wasn't safe.

Don't listen to the gun store commandos who repeat urban legends...and usually embellish the tale. If you want shoot your rifle with confidence always ask the experts...the manufacturer...they're just an e-mail away

Never bring a knife to a gun fight...