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racer-x

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    Jay Mackey

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  1. True Blue is a great powder that burns clean and meters well. Works great for 9 minor. I use it with 124's for production & PCC loads. I do NOT recommend for 9 major though - too fast a burn rate and builds pressure dangerously quick with very minor OAL changes.
  2. I might have missed the finesse point when I tried the Lee FCD, but my experience with 9 major resulted in bullets that were very easy to pull. I could be wrong, but my determination was that this was a result of differences in elasticity between the bullet & brass (Young's mod.). The FCD squeezes the brass much lower than just the edge of case mouth where a normal crimp die works. Pressure applied here results in different amounts of rebound from the bullet & case that results in less tension holding the bullet. My loads are MG 115 JHP's loaded to 1.165 OAL. This leaves only .270" of bullet in contact with case. Zero problem with setback with this load using Dillon / Lee resize, Dillon/MBF powder funnel & Dillon crimp dies . Swap out and adjust Lee FCD per Lee directions, bullets can be pulled out by hand without tools. Maybe I missed something with the FCD setup, but I went back to what worked. zzt, What OAL & Bullet are you using the FCD with that works for you?
  3. Jason, Just for grins, try loading some dummy rounds with out the MBF powder funnel. Either use the factory Dillon powder funnel, or you can do it carefully with no flare at all. Then remove crimp as usual. My bet is you will not be able to get any setback under normal circumstances (i.e. no hammers or power tools). The brass should be sized down perfectly in station 1 (assuming the die is all the way down). The test above will prove this (or not). If your MBF powder funnel is a little larger OD on the first step than it should be, it will resize out a very significant section of case that needs to be tight to hold your bullet in place. I sanded mine with fine 600 grit then 1000 grit sandpaper. Then shined to a mirror glaze with Mothers polish and Dremel buffing wheel. FYI, I just measured my MBF powder funnel: 1st step = .347 " 2nd step = .355 " Also, I tried a Lee FCD with 9 major loads and it reduced case tension significantly. My favorite resizing die for 9major is Lee undersized die. I also grind the base until it just touches carbide section. This removes some of the unecessary flare and lets you resize each case a little farther down (allows die to be screwed deeper into tool head). How much material you can remove depends on the individual die. Do not grind into the carbide section.
  4. I do not. I always start match with a clean & lubed gun. When I'm able to practice during the week, I still only clean & lube once a week just before next match. My favorite lube is Valvoline SynPower 5W-30, although I used Mobil1 5W-30 for many years with zero problems. Only time these don't work flawless is if the temp stays below freezing - then 0W-20 is the ticket.
  5. Nice looking gun Jason!
  6. The corncob was 'pre-installed' from Montana Gold
  7. Agreed. I'm not saying the MG CMJ's aren't capable of being accurate. MG knows how to make a high quality and consistent bullet. I expect that I could work up an accurate load with these in a gun with a more conventional throat profile (i.e. a barrel that wasn't throat reamed to chamber long 9 major loads) I am saying that they are not an option for me with any of 9 major open guns (barrels throated). Also, I did experiment with crimp on these CMJ's with no difference in performance. I seat & crimp a bullet and then measure the crimp ring left on the bullet. My experience is that this crimp ring measuring .001-003" less than the bullet diameter is optimal and accompanies a completely straight case mouth (no bell or crimp). I first tested with my normal .002" crimp ring and then backed off to no measurable/visible crimp ring (very slight case mouth belling). No difference in accuracy, but not what I would load either since the slight bell on case is problematic.
  8. I repeated my previous baseline & tests with a different gun today. My standard load (MG 115 JHP's loaded to 1.165 with 10.8 AA7 & CCI500) shot ragged hole groups at 25 yards over and over. MG 115 JHP @ 1.165 OAL - 1/4" groups MG 115 CMJ @ 1.165 OAL - 3/5 in 10" target MG 124 CMJ @ 1.165 OAL - 3/5 in 10" target MG 124 CMJ @ 1.200 OAL - 8" -10" groups MG 121 IFP @ 1.165 OAL - 2.5-3" groups and again: MG 115 JHP @ 1.165 OAL - 1/4" group JHP plunks & spins out to 1.205 OAL (1.205 - 1.165OAL=.04) CMJ plunks & spins out to 1.270 OAL (1.270 - 1.165OAL=.105) Since the longer 1.200 124's were more accurate than the 1.165 loads, my freebore theory seems like a big factor. Problem is I can't load the CMJ's in a 9MM out to 1.230 in this barrel to have the same freebore as the JHP's. Lots of testing and I'm right back where I started - JHP's rule in my 9 major open guns.
  9. I have not tried AA5, but looking at it's relative placement on several burn rate charts is enough to keep me from messing with it in a 9 major load - not worth it to me. I'd use the AA5 for minor loads. AA7 is my favorite powder for 9major. Slow burn, (relatively) low case pressures with lots of gas to work comp & popples. If it's too dirty for your gun to run reliably, that's definitely a problem. How do you lubricate your gun (what & how much) ? Might try some variations with lube to see if you can get reliable operation with AA7. Maybe go lighter weight oil (i.e. try 0W-20 if you are currently running 5W-30).
  10. +1 Speaking of cracks, I used to find a cracked case every month or so when I was shooting faster powders like True Blue due to the higher case pressures. Since switching to slower powders like AA7, I haven't found a split case from my gun in 2 years now. That's with a healthy 10.6-10.8 grain charge under a 115 as well. I thought I had loose primer pockets once last year, but it turned out my 1050 needed the primer depth increased .002" to work with all the mixed head stamp brass I put through it.
  11. Yes, the MG CMJ, IFP and JHP's all measure the same exact diameter.
  12. I recently got a thousand of each - 115 and 124 CMJ's, and also 121 IFP's to test out. Haven't done accuracy testing on the 121 IFP's but like you said, they are just filled 115's - I expect they will be just as accurate. Now that my loads are confirmed, I need to use & evaluate each in practice. Have always come back to 115's though - just like how dot tracks & returns faster with them. Experimenting with different combinations and building my understanding is part of the fun for me.
  13. Yes sir, I do and that's exactly how I remove the corn cob. Still have to inspect and use a tooth pick once and a while on the few that resist the air. Think I picked that trick up from you on another post last year - thanks!
  14. Thanks Jason - I cant make match on Sunday. What JHP's are you using now? No corn cob in them from manufacturer? This is a new situation with MG. I've used tons of them over the years, and this last purchase of 16K is the only time I've ever seen this. Hopefully it was a fluke. So on another tangent, since I've been picking out corn cob anyway, I started using a DIY lanolin case lube and then tumbling for 15 minutes. Figured since I was already picking corn cob, why not ? Love how much easier this makes loading so much, I loaded up 5 gallons of 9 major the next day and wasn't sore at all. Funny though... looking to reduce steps and I added one instead
  15. My last 4 cases of MG JHP's were full of corn cob straight from MG. Tiny little pieces that hide in the HP and have made it into my gun if I don't pick it out. Worst case was when it got into trigger and blocked trigger from moving enough to break shot. I pick it out now. I'm going to try some of the longer 124 CMJ's out to 1.200 to test the freebore theory, but there isn't room to increase OAL significantly on the 115's and maintain reliability (i.e. bullet staying in case). I like how 115's feel with AA7 best and also like knowing I can hit a 10" plate at 25 yards 10 out of 10 times. Might end up just picking corn cob.
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