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racer-x

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Everything posted by racer-x

  1. I recommend that you determine what the max OAL is for this bullet in your chamber. Make a dummy round that is extra long - say 1.200 as a start. Plunk test it and gradually reduce the OAL of your test round until it just passes. Then you know what your OAL needs to be under 100% of the time in your gun. You might find out your chamber is throated longer than you thought and your 'long' loads aren't even close to being a problem. AA7 is a very slow powder and forgiving powder (slowest powder widely used for 9 major). Shortening your OAL from 1.165 to 1.145 is not extreme at all. You may need to drop .1 grain to maintain the exact same PF. Chrono to be sure and look at your primers for increased pressure signs. I normally load at 1.165 as well, but recently experimented with 1.145 OAL loads and MG115JHP's. Dropped my charge from 10.8 to 10.7 AA7 for the same PF. Primers looked the fine - same as longer loads. Accuracy of shorter loads was definitely not as good in my gun. If you play with shorter OAL's in a gun throated for long loads, you need to shoot some groups off a bag to ensure you accuracy is still what you want.
  2. I like to load 5 gal of bullets at a time and the temps & weather in the Midwest are anything but consistent. Significant temp sensitivity in a powder is a no-go for me.
  3. So the Lovex D037-01 sounds like its a clone of AA#7 (same density & similar charges), but with reports of being temp sensitive? AA#7 has not shown to be temp sensitive for me, and performs as good as anything I have tried (long list).
  4. Could you load a resized 9MM case to the very top with Lovex D037-01 (scrape off flat) and then measure that amount please? I'm curious how it compares to the others I've measured: full 9mm powder case --------- -------- WAC 12.3 N350 9.4 HS-6 13.9 True Blue 14.2 W572 10.9 * 3N37 10.2 3N38 10.2 AA#7 13.8 * data from other BE user
  5. In handguns, I use a full synthetic Motor oil (Mobil1, Valvoline or Royal Purple) in 5W-30 above freezing, and 0W-20 if I will be operating below freezing. 0W-20 works better all the time in my AR's and 22's.
  6. I shot drills with mine at 164, 170, 172 & the max I could get with 115's & AA7, 173 PF (1507 avg fps). Gun was surprisingly flat even at 164PF, but seemed at its best overall between 170-172PF to me. Gun shoots really, really nice! I would expect your 38SC gun to shoot very good with 3N38 & 115's between 170-172 PF as well. You need to test to see what feels best to you.
  7. Here are the results of my AA7 load dev with MG 115 JHP's and my Chaos. My load is 10.8 grains for 172.3 PF. Gun doesn't shoot any flatter with 11.1 grain load, but is noisier
  8. The benefit of SPP with 9 major is that they deform and indicate when pressures are approaching dangerous levels in a fully supported chamber. Small rifle primers are much harder and will not offer any warning of extreme pressures. If you have your load dialed in and never change anything, SRP could work just fine for you. I've had pretty big variations in powder between lots , a scale go bad and my charges were off when changing loads, 124gr JHP's mixed up as 115's, OAL adjusted a little short with powders that do really not like that... lots of possibilities where the SPP's can warn before something bad happens. SRP will work, but you are giving up a valuable insight into what is happening when you pull the trigger.
  9. Finally ran the battery down on RTS2 to where it began to strobe (replace battery indicator). This was after a total of 58 hours set to full bright with the ending voltage at 2.067. Resting voltage was back up to 2.844 the next day. Strobing dot intensity appeared around 50-60% as bright as with a new battery. And of course, this is with a specific RTS2 and battery, results will vary with different components.
  10. RTS2 is 8MOA and DPP is 2.5 MOA. With both optics set to full intensity in this test, the MOA's should not matter. In practical terms though, small MOA optics usually consume batteries faster because the user sets the brightness higher than if they were using a larger MOA dot. There's just more to see with a larger dot, so it doesn't need to be as bright.
  11. No, I have not. From what I've read here, it sounds very similar to AA7 though. I'm really happy with the performance of AA7. It's readily available local or online and checks all of these boxes for me: gun performance - lots of gas accurate low pressures (slowest burn rate compatible with 9major) low cost easy to load (its a fine grain powder - you may need my tape trick on Dillon powder bar) NOT temp sensitive (no significant changes measured between 25-110F)
  12. Sorry for going off the topic of a starting load for 3n38. I agree with kneelingatlas, 8 grains under a 125 is a good starting point. I've been all over this road trying & wanting to make 3N38 work for me with 9 major... even though I really like 3N38, its just not worth it to me in 9 with AA7 as an option..
  13. AA7 is even slower burn rate than 3N38 (safer, more gas for comp & holes), MUCH easier to load (dense powder does not fill case) and less expensive. Only down side in this comparison is AA7 is a little dirtier burn than 3N38. I've used 3N38 for many years and this hasn't been an issue for me at all. I recently shot 800 rounds in my new Chaos without cleaning using my 10.8 grain charge of AA7 loads and zero malfunctions. Gun was not that dirty.
  14. Chaos 9 comes with two big 3/16" holes in barrel. I discussed having a 3rd 3/16" hole in barrel or comp on my build and Adam recommended against that. Said they had done a lot of testing with 2 vs 3 holes on 9 and 2 holes won. I took his recommendation on that and my gun shoots awesome.
  15. Good info - thanks. 20 hours of full brightness testing completed and still no failures, strobing or significant loss of brightness. This is much better performance than I expected out of the RTS2v4 RTS2v4 dot brightness diminished a little in the first 6 hours of operation, but has not reduced any since then. A 'little' being around -10% or like reducing intensity with 1 adjustment on down arrow. DPP dot intensity at end of test was same as with a new battery. * regular rest periods were reduced to 10minutes and overnight full rest periods are 10 hours - noted on graph The RTS2v4 graph line demonstrates a much wider range in measured voltage between when battery is first removed from optic and after 10 minute rest. This indicates a higher loading on RTS2v4 battery during operation compared to DPP.
  16. I'm still pushing these batteries to see where the failure points are. Have my RTS2 down to 2.427v at the 10 hour mark, but have not seen the dot strobe yet? I tried power off & on a few times as well and still no strobe. I've seen this strobe on previous occasions shooting, but not yet on this particular RTS2. BTW, this one is a fresh replacement from C-More about 2 months ago. Max dot intensity at this reduced voltage is still very usable for an overcast day like today. Wouldn't be ideal in full sun though. I've been checking my RTS2 batteries before matches and replacing them if they were below 3.0v, thinking this would help match reliability. I've observed that the RTS2 max brightness at 2.9 resting v is nearly indistinguishable from a new battery. In fact, I haven't seen any dot weirdness at all yet (blinking, turning off, etc.). At this point, I don't think the low voltages I've reached (2.89 - 2.91 range) had anything to do with the failures I've had.
  17. I've been chewing through batteries on my RTS2's for the last year and a half now and decided to try the DPP. Now that I have one, I was curious how the DPP battery consumption compares to the RTS2, so I set up a test to compare. Here's the overview of what & how I tested and the results. Objective: Quantify and compare battery consumption characteristics of C-More RTS2(v4) and Leopold Deltapoint Pro. Overview: Starting with new batteries, leave both optics on for 1 hour increments at full brightness, alternating with equal periods of power-off rest before starting next session. Used two new Duracell 2032 batteries from same manufacture & expiration lot. Challenges: DPP goes into power saving mode after 5 minutes of no motion. This requires that optic be moved every 4 minutes to keep dot active. I wore the gun on belt throughout each DPP test. RTS2 does auto power-off at 8 hour point which does not present a challenge in this test. total hours description RTS2 DPP full bright ---------------------------------------------------------------- test1-v1 3.297 3.293 0 --- 1 hour full brightness --- test1-v2 2.783 3.028 1 test1-v3 2.923 3.067 1 --- 1 hour full brightness --- test2-v2 2.706 2.962 2 test2-v3 2.903 3.034 2 --- 1 hours full brightness --- test3-v2 2.689 2.933 3 test3-v3 2.884 2.993 3 --- 1 hours full brightness --- test3-v2 2.669 2.901 4 test3-v3 2.863 2.950 4 --- 1 hours full brightness --- test3-v2 2.631 2.896 5 test3-v3 2.854 2.929 5 --- 1 hours full brightness --- test3-v2 2.593 2.890 6 test3-v3 2.849 2.919 6 ------------------------------------------------------ v1=battery start voltage v2=battery voltage after 1 hour full bright operation v3=resting battery voltage 1 hour after v2 measurement
  18. Agreed. As another point of comparison, consider how differently the gun feels between first shot and last shot with a big stick. With my setup, that's 12.87 oz. lighter at the end of mag. Very noticeable to me. 18.28 oz. - 170 mag + 30 rounds 5.41 oz. - 170 mag - empty
  19. My experience is just the opposite. Assuming proper technique (footwork, lower stance, balance, etc.), shooting A's on the move is easier with a heavier gun. Newton's 1st law in play here.
  20. Agreed on the split speeds being down the list of priority's. Fast A's on the move are where its at. One of the hardest transitions we make is from the holster to first target. My point with that example in my training at least, was that I can still get 2 shots into a target just as fast with the heavier Chaos. Thinking the balance of the Chaos weight being further back helps this a lot. Much heavier grip and shorter overall length gun with lighter Titanium comp compared to lighter CK Thunder with poly grip. Chaos is not as nose heavy as a traditional full size gun with steel comp. At least for me, transitions have not slowed with the Chaos.
  21. I weighed my CK Thunder and Chaos for fun - CK Thunder was 42.2 oz, Atlas Chaos 53.3 oz. Only had the Atlas for a week now, but I don't think the weight is a negative. In practice last week, I was still able to get fast hits from a draw in same time as with lighter gun. While the Chaos feels heavier doing it, my hits were consistently better with heavier gun in this drill. Much greater control - I like it. The grip is amazing - waiting on my hands to toughen up more to support the fun now!
  22. Thanks Jeff. Before every match now, I check battery voltage in my RTS2's and replace if less than 3.00v. Had dot problems 2 times that a new battery fixed. The problem batteries were 2.89 & 2.92v when I checked them after match. Replacing if below 3.00v has helped my match reliability, but works out to changing 2032's every 3-4 weeks. Duracell's seem to be best in my experience as well. More consistent starting voltage compared to others I tried. Not sure if the dielectric grease will promote a lower impedance connection in use. Worth some experimentation though. I have noticed that the battery is pretty scuffed up from recoil by the time I replace it in RTS2.
  23. I just got my first Deltapoint Pro optic and it came with dielectric grease on both sides of the CR2032 battery. I understand what dielectric grease is, but have never seen it used in an optic. Anyone have experience with this and use it in your optics?
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