Beretta06 wrote:I've called RSI on a few occasions and to fair to B.P. I did find one RSI rep a few years back an ass. but my question was answered diffinitively.
Answered in writing on company letterhead ??????
Your having fun with this aren't you.........
First rule of reloading is don't believe everything that is published is going to turn out the way they say it will, second rule is use several different data sources, somewhere in the compilation of data something will work correctly.
This has been very true in what we have found also>>>> The W209 and CH209 have shown to be efficient in the same style of loads. However the CH209 does burn hotter. Depending on the propellant and load being utilized, you can see drastic changes when swapping
The Cheddite CX2000 primers have given us 50-80 fps higher velocities in the same load than the Blue Box Winchester primers, while velocity spreads have been pretty much the same with both primers.
I don't know if things have changed or not but RSI did not do the original testing of their loads, they may now I'm not sure.
Original testing and much of the tweaking/reworking/design however you want to put it was done by Ballistic Research which is Tom Armbrust's company. Your not going to find to many other folks in the shotgun world more knowledgeable about shotgun ballistics than Tom.
I originally spoke with Tom when the white box Winchester primers were phased out and the new Blue Box primers came on the market, basically because we weren't getting the same results we did with the new primers. He told me that they were getting similar results when using STEEL powder, which was much poorer and erratic ignition.
Back then, Activ was using the Cheddite primers in many of their loads and RSI had several Activ hull STEEL powder loads.
My opinion is since the results with the newer Winchester primers were so much poorer than with the older White Box primers, RSI may have figured out the Cheddite primers where a bit hotter and gave better ignition than the newer Winchester primers and why they recommend them as a substitute.
Just an educated guess.