gianmarko Posted August 28, 2013 Author Share Posted August 28, 2013 in the meanwhile i have experimented with loads i have gone up with powder doses. moderately up, as i dont want to blow up anything so my impression, and keep in mind i am a total beginner with open guns and major loads, is that after all the comp is working fine and perhaps the problem is a too soft recoil spring. going up with powder doses i >think< the muzzle flip is increasing, not decreasing. plus cases are ejected very far away. and i start seeing signs of overpressure on the primers, which are quite flattened. but id like an opinion from the experts, i will post some pictures of cases later on in the meanwhile here a video of a speed exercise, using a load developed using locally produced powder which is quite popular in the open gun community. this load sends a 124 grs bullet around 1380fps. Link to comment Share on other sites More sharing options...
kneelingatlas Posted August 28, 2013 Share Posted August 28, 2013 If you have access to SP2 you're in luck as it's considered my many the very best powder for 9 Major. I'm in a nearly identical situation: I started with 135gr bullets and was unhappy with the muzzle flip and realized I was starving the comp of gas, so I got some 100gr bullets to max out the gas and WOW! 10gr of SP2 pushes a 100gr bullet at 1650fps and makes major in my CZ. the only problem is the rounds are a little short so I had a handful of misfeeds in a 250 round match. A buddy took video of a run with no malfunctions, I'll post it today so you can see how flat it is. I'm getting some 115s this week which should strech out the OAL and eliminate the feed issues. Link to comment Share on other sites More sharing options...
kneelingatlas Posted August 28, 2013 Share Posted August 28, 2013 Pay no mind to the 180 violations... Link to comment Share on other sites More sharing options...
kneelingatlas Posted August 28, 2013 Share Posted August 28, 2013 (edited) Here's my load data for the CZ: Edited August 28, 2013 by kneelingatlas Link to comment Share on other sites More sharing options...
Big Dog Howie Posted August 28, 2013 Share Posted August 28, 2013 (edited) Here is a video of me shooting my Open CZ 75 SA major loads 6.9 grns Auto comp 124 grn MTG FMJ 1.130 OAL CCI SPP power factor around 169 If you look the gun runs very flat,I am using a 6 # recoil spring that has had 3 coils cut off with a solid guide rod Edited August 28, 2013 by Big Dog Howie Link to comment Share on other sites More sharing options...
gianmarko Posted August 28, 2013 Author Share Posted August 28, 2013 that looks awesome, really flat. ill look into soucing 115 grains bullets, which might not be easy. thanks for the info and compliment for the stage, really fast wish we had such nice ranges here. If you have access to SP2 you're in luck as it's considered my many the very best powder for 9 Major. I'm in a nearly identical situation: I started with 135gr bullets and was unhappy with the muzzle flip and realized I was starving the comp of gas, so I got some 100gr bullets to max out the gas and WOW! 10gr of SP2 pushes a 100gr bullet at 1650fps and makes major in my CZ. the only problem is the rounds are a little short so I had a handful of misfeeds in a 250 round match. A buddy took video of a run with no malfunctions, I'll post it today so you can see how flat it is.I'm getting some 115s this week which should strech out the OAL and eliminate the feed issues. Link to comment Share on other sites More sharing options...
kneelingatlas Posted August 28, 2013 Share Posted August 28, 2013 Here is a video of me shooting my Open CZ 75 SA major loads 6.9 grns Auto comp 124 grn MTG FMJ 1.130 OAL CCI SPP power factor around 169 If you look the gun runs very flat,I am using a 6 # recoil spring that has had 3 coils cut off with a solid guide rod Nice work on that Texas Star Big Dog! I've never tried AC, maybe we can trade samples if we ever get to shoot together. Link to comment Share on other sites More sharing options...
Big Dog Howie Posted August 28, 2013 Share Posted August 28, 2013 Thanks Yes come out some time and I'm more than happy to let try out these loads. I do have some HS6 but have not worked up a load yet Link to comment Share on other sites More sharing options...
bikerburgess Posted August 28, 2013 Share Posted August 28, 2013 that looks awesome, really flat. ill look into soucing 115 grains bullets, which might not be easy. thanks for the info and compliment for the stage, really fast wish we had such nice ranges here. If you have access to SP2 you're in luck as it's considered my many the very best powder for 9 Major. I'm in a nearly identical situation: I started with 135gr bullets and was unhappy with the muzzle flip and realized I was starving the comp of gas, so I got some 100gr bullets to max out the gas and WOW! 10gr of SP2 pushes a 100gr bullet at 1650fps and makes major in my CZ. the only problem is the rounds are a little short so I had a handful of misfeeds in a 250 round match. A buddy took video of a run with no malfunctions, I'll post it today so you can see how flat it is. I'm getting some 115s this week which should strech out the OAL and eliminate the feed issues. you may want to check the IPSC rules, there is a 120gr minimum bullet weight for major powerfactor in open division (IPSC rule book Appendix D1) Kneelingatlas your major 100gr load is also a no go in USPSA as there is a 112gr minimum also in Apendix D1 just in the USPSA rule book Mike Link to comment Share on other sites More sharing options...
kneelingatlas Posted August 28, 2013 Share Posted August 28, 2013 there is a 112gr minimum also in Apendix D1 just in the USPSA rule bookMike I'll be damned! Thanks for the info Mike. I guess I should read the rule book again when I start a new division. Link to comment Share on other sites More sharing options...
Heckler Posted August 29, 2013 Share Posted August 29, 2013 This is mine with 124gr Frontier bullets loaded at 1.165 OAL 7.0 grains of AutoComp. FYI, stage 3 is my first ever 100% classifier!! Link to comment Share on other sites More sharing options...
Big Dog Howie Posted August 29, 2013 Share Posted August 29, 2013 Dang bill that thing shoots fast and flat. What power factor are you getting with your load. Link to comment Share on other sites More sharing options...
Heckler Posted August 29, 2013 Share Posted August 29, 2013 Dang bill that thing shoots fast and flat. What power factor are you getting with your load. At the SC state match this year I was 168.7pf Link to comment Share on other sites More sharing options...
Big Dog Howie Posted August 29, 2013 Share Posted August 29, 2013 (edited) Nice. I'm close to that I think Mine shoots pretty flat but would like it to be even more than it is. Also my comp is only 2 ports Edited August 29, 2013 by Big Dog Howie Link to comment Share on other sites More sharing options...
gianmarko Posted January 6, 2014 Author Share Posted January 6, 2014 Hi all im resuscitating this old thread as i have done some research and came up with some results so to make a long story short, i have found that 8.5 grains of SP2 behind a 124 grs copper plated bullet loaded at 28.8 OAL will give a round that shoots really nice and flat at speeds around 1400 fps with this round my CM shoots better and flatter that my friend's STI. as an aside, i have loaded some rounds using fiocchi fmj bullets loaded at 29.9 7.8 grains of SP2 will push the bullet at 1250 fps, which is not enough to make factor, but the round is as smooth as silk, no barrel flip whatsoever, so much that the red dot stays in the middle of the lens. next step, will increase freebore so that i can load copper plated bullets at 29.9, i expect really good results using the SP2. i have tested other powders but the vectan is on another level altogether Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now