I go up to listed max just to get a data set for comparison. I'm playing with heavies right now and will probably have 170s going that speed. You may contact hogden with a data set and see if your results are way off expected. Did you happen to get a verification load across the crono the same day?. My 13.7 load runs right about 1200 so I'll shoot one of those to see if I get what I'm supposed to.
To get the same velocities you have to use the same bullet - a Meister 158gr cast (18BHN) LSWC - and the same firearm - an unvented universal receiver with 10” test barrel. You will also need to use the same chronograph and lab equipment. Trying to impose lab equipment figures on field testing is a no-go. Use the most accurate load that gets you a useful velocity for the intended purpose and don’t worry about what the ballistic engineer got in the testing lab. It’s not a realistic comparison.
My 1200 fps load with #9 is roughly 150fps slower than Lyman where it came from. I don't know what optimum conditions they use but I assume part of my reduction is pc over lube....
As others have pointed out, unless you are shooting a T/C Contender with a 10” barrel, you shouldn’t expect to approach numbers for a 10” closed breech test barrel. Also, consider that your Ruger Security Six was discontinued back in 1988, so yours has been in service for at least 34 years. If it has been fired a lot (particularly with hot 125 gr loads), it is reasonable to assume barrel wear and forcing cone erosion could also result in reduced velocity.
I'm also constantly having to remind myself that my Chrony needs a yard or more to read accurately. So what I'm seeing is a long jump from the muzzle and it's not exactly the most accurate device to begin with. But, it lets me know when I'm in the ballpark. I just need to know how close I am to what I've come to expect from my guns. My Colt Lawman saw a LOT of 125gr. Speers JHP and W296 back when I first got it. I thought that stuff was the coolest! I was horrified at what that combo did to my forcing cone and cylinder face but it still shoots fine. Ugly but effective. We have a lot in common.
Cfep for 38/357 is not on my buy again list. The start load of 8.8 grains true blue was way better.
I'm burning mine up in 45acp with a 200 swc at a max charge at 1.2 oal. Works good there for me.
Enforcer (a.k.a. Accurate 4100) is really good for heavy loads.
After the first 10 shots my SD was 6, should have quit right there for stats sake. Shoots point of aim. This is probably faster than this bullet was made for but I seem to like it.
I've also see high sd's with Heavy pistol. I am at some point going to need to test spp vs spm to test their claim that mag primers are not nessary. At very low charge weights it seems to give better burns than #9 but that transitions. I'm inclined to continue comparisons at 13.7 and in a 38-55 loading with a 180.
Tested my first loads with lil gun. The bullet for this side adventure was the 180xtp. I'm using cci 550 spms. I did not focus on shooting groups as I was checking for good ignition and heat based on the problematic reports. It was 45 and pretty windy so I didn't expect heat problems or observe any. The wind did push my group to the left a little, and they shot low as I didn't want to tweak juniors sights the weekend before his last practice. 13.0, 13.3, and 13.6 all tested good. I'll probably skip a few tenths and do the same thing with 14.p 14.3 and 14.6. There were absolutely no pressure signs and far less felt recoil than a max load of #9 and a 158 jhp.
Someone tell me I’m pulling shots. I don’t want to know my Blackhawk has a wonky chamber out of 6.
