I would think the suppressor would add to your velocities. Rarely do I have QL match exactly, but usually within 50 fps. The 257 ARS was much higher than QL predicted as well as the 30 Slugger, was lower. I did the same thing and measured with grains of water to verify case volume. There are a lot of tweaks you can do with QL but I usually don't mess with much. I did talk with Ed from Neconos a couple of times after I first got QL and was very helpful. As far as load development I look for the 100% burn rate, or 100% case fill.
I have varying views on gas port / powder rate after working with the piston systems. Why not put an adjustable gas block on it, open up the port, and tune from there? BTE makes some easy and reliable blocks. We're a dist for them or you can order direct from them. The Tok's work great this way running from surplus to subs. Yes, have run a bunch of Unique in just about everything including 5.56! I don't have a can, so I don't know if the excess gas is an issue or not. One thing that QL does for me is shows pressure curves & max pressures so playing with bullet wgts and seating depths is interesting.
Modified the throated barrel for our new pistol set up and tested loads of 9gr of Lil Gun and the Hornady 90 gr XTP. Had a failure to fire with a light primer strike so going to have to check my head space on that barrel. I didn't have any issues before so something is going on. Seated the bullets way out to test and these loads are stiff! QL only shows about 20ksi pressure so something is going on here compared with the full power 2400 loads. Will try the load in the first upper as a comparison and then switch over to 2400 powder and try again.
Tested the Lil Gun loads in the first upper and the bolt didn't lock back. Using the Pro Mag adapter, which does not run as smooth as the PSA or AMM, but the load didn't seem overly harsh.... will do some more checking...
Yep, I used my 30 Slugger brass to make the chamber on #98 and its .040" deeper than the 30 Luger. All my brass is formed in std 30 Luger dies so its time to make some new brass....
Found the issue with the FTF and I had chambered Brl #98 using my 30 SLuger brass which is full size 9x23 sized in 30 Luger dies with the shoulder moved forward .040", in effect, deep chambering a 30 Luger. Finished 30 SLuger brass is in the .900 - .903" range. For a comparison you can see a 30 Luger on the left and the 30 SLuger on the right
Another learning moment: When firing the same load, 9 gr of Lil Gun in the two barrels, the 30 SLuger was very harsh and locked the bolt back even with a super heavy buffer system. Getting the head spacing right, running the same load with proper head space, the round was soft and did not lock the bolt back. Yes, adding the .040" increased the volume of the case a bit thereby decreasing total pressure, but I had already seated the bullets way out to fake out the head space issue so that should be a moot point. Bottom line is, the right chamber is the best chamber...... So by accident I chambered a 30 SLuger barrel. I wanted to keep everything stock to get all my testing done and not have 3 more cans of brass laying around! Too late for that..... and this is what we have to date: 1. 30 Luger - factory brass & ammo good for 34,000 psi 2. 30 Super Luger: 9x23 SC brass cut down to .843" and loaded up to 44,000 psi 3. 30 SLuger: 9x23 SC brass sized in "long" 30 Luger dies to oal of .900" and loaded to 44,000 psi fired in deep chambered 30 Luger barrels.
Remember, I have new reamers coming that will take the 30 Luger chamber and move the shoulder forward and blow it out a little bit so hopefully the 30 SLuger will not chamber in a 30 Luger.
Now to get back on this pistol upper........ and figure out if I want to use 30 SLuger, 30 SLug'r, or 30 Slugger
Test more 30 Slug'r rounds today. These are the deep chambered 30Luger ones. Running 11.0 gr of 2400 and 90 gr XTP bullets we are knocking on the door of 1800 fps from a 10" blow back barrel with an average of 1787 fps. I thought our Tok did 1840, but my notes said 1680. Ill have to verify that tomorrow plus i can still bump up the Slug'r a bit so we can test that too. I also loaded up some 125 & 147 gr sub loads and still fell short of 1000 fps, but they are fun. Have to do single shot, but still fun. I do need to try some faster powders but we'll see if we can hit 1800+ with the 2400 first.
Verified chrono readings today and hit the upper limit on the 30 Slug'r. we did hit over 1800 fps but loads were past maxed out. The plus side is that we can safely exceed tokarev balistics which we confirmed today at 1680 average. Opetation was a bit different than the tok mainly i think because of the slower powder. We'll continue to work on this and rechamber when the new reamers get here. We should be getting close to delivery now. The new reamers should give slightly more case capacity and drop pressures accordingly. Move over Tokarev, theres a new dog in town.
Monsoons hit the area so I loaded up some Slug'rs with some slower H110 and faster Herco while its raining. Goal is to see how the pistol upper handles the different powder burn rates. The recoil is noticably less on the more powerful 30 Slug'r than the Tokarev with the only difference being mainly powder burn rate.
Testing has been ongoing with the Slug'r and the pistol uppers. Powder burn rate has a big effect in how the round operates so I've been testing many different powders. With the faster powders like Herco, FPS were more consistent, but much lower, hitting 1626 - 1678 fps. H110 on the other hand had much higher velocity hitting over 1950 fps, but the spread was all over going down to 1863 fps which is close to a 100 fps variation. To try and bridge the gap between the two powders, Herco and H110, I got a can of Winchester Autocomp. Looking at powder burn rate charts, which are meaningless to chuck hawks ( chuckhawks.com/powder_burn_rate.htm )who has a point, but you need to start somewhere. The reason I looked at charts is because Auto Comp is not listed in my QL file. I tried inserting this pdf but photobucket wouldn't let me: www.hodgdon.com/PDF/Burn%20Rates%20-%202015-2016.pdf From that chart, out of 150 powders, Herco is #35, AA#5 is #41, Auto Comp is #43, AA#7 is #51, 2400 is #55, and H110 is #63. My first choice was AA#7, but I couldn't find any so I found the Win Auto Comp and figured I would give it a try.......... I'm not even going to list the powder charge because I blew up cases right out of the gate and pulled every reload. So a lesson was learned on using Burning Rate charts for data. Seeing as I have a can of this powder, I'll cut my charge in half and try it again while I look for some AA#7. Now I'm back at the shop full time and working hard to get these rounds developed. I'm pulling uppers apart today and doing cleaning and inspections. My next move is to modify a set of 30 Luger dies to add the .040 - .060" needed to the bottom of them to get a fixed shoulder position on the 9x23 cases. I sent out an email to the reamer maker to check the status of our new reamers and got an autoreply stating how busy they were......
Finished update on new Blow Back barrels and the 8" turned out great. Have some 30 cal 10" ready to go and will try them tomorrow. Will do a couple in the .30 Luger and then a 30 Slug'r and 762x25 Tok. Got 2 in .338 that we've been sitting on for a couple of years, going to try one in Blow Back.....