Over 15 years ago Bear Creek Supply started sponsoring my SASS Club's 3 day match with several hundred (probably several thousand) 100 count sample bags in every "Cowboy" bullet they make. I have loaded them in 32-20, 38 Special, 44 Special, 44-40, 45 Colt, 45 S&W Scofield, 45 ACP, & 45-70-400. When I needed bullets for 38-55 and 45-90-300 I ordered the diameter I needed and, in a few days, they were at my door step in Ohio, all the way from California!
The 38-55-255 were loaded over Trail Boss in a load that was "Volume Specific" to virgin Starline Brass. (never compress Trail Boss) Using A modern Lyman Tang sight and a Lyman 17 front globe on my 2005 manufactured Winchester 1885, I shot a 100-yard, 20 shot group of 1/2" outside diameter! You can't beat that with a stick!
I also ordered in a 500 box of 45 rifle bullets for my 1886 in 45-90-300. I got a very similar performance with the 300's!
Bear Creek Bullets are Moly coated. I wasn't too sure about the coating and lead bullets. I wasn't sure until I loaded a match's worth, and they shot so much better than any other commercial brand I've tried!
Ivan