ar15rick Posted November 21, 2015 Share Posted November 21, 2015 I recently got an STI open gun in 9mm and 38 super, 2 different barrels. I had all the components to load 9mm so I did. I loaded them with the following: 124 gr xtreme HP Fed small rifle primers 6.8 gr of autocomp (to make major) 1.165 OAL Everything cycles properly but the accuracy is bad. I mean at 15 yards I could not get a group at all. One bullet will hit center then one will hit about 6 inches low then another will hit a few inches either eight or left. And this even worse at 25 yards, at times it doesn't even hit paper. I then put some regular blazer brass 115 gr and thw gun grouped the way it is suppose to. What can you all tell me to do to get the consistency and accuracy of the bullets. I know it's not the gun because it grouped well with the stock blazer ammo. Thanks, Link to comment Share on other sites More sharing options...
Open1215 Posted November 21, 2015 Share Posted November 21, 2015 What are you loading on? Side note, Check you Cmore screws! If they rattle loose you will be all over the place. Even w lock tight, they can heat up and get loose. Link to comment Share on other sites More sharing options...
kneelingatlas Posted November 21, 2015 Share Posted November 21, 2015 Xtremes don't group that well outside 10yrs at major PF. If you want I'll sell you a sample pack of Montana Golds which will knock your socks off! Link to comment Share on other sites More sharing options...
ar15rick Posted November 21, 2015 Author Share Posted November 21, 2015 I'm loading on a dillon 550. I did check the screws and they weren't lose. Even then as soon as I was done with one mag of the stuff I loaded, I put a mag of the regular blazer ammo and it shot well. Link to comment Share on other sites More sharing options...
Sarge Posted November 21, 2015 Share Posted November 21, 2015 If you are not using Xtremes HP or heavy plate RN the plating is probably shearing off at major velocity Link to comment Share on other sites More sharing options...
ar15rick Posted November 21, 2015 Author Share Posted November 21, 2015 I will try some Montana gold. If you do have a sample pack hoe much do you want for it? PM me if you want. Link to comment Share on other sites More sharing options...
Open1215 Posted November 21, 2015 Share Posted November 21, 2015 Ok. I was thinking setback issues possibly. I had good luck with xtreme HP but I don't think I was much over 10 yards, however if I'm shooting 2in groups at 10 I don't see it being crazy at 15. Link to comment Share on other sites More sharing options...
ar15rick Posted November 21, 2015 Author Share Posted November 21, 2015 They are extreme HP Link to comment Share on other sites More sharing options...
ar15rick Posted November 21, 2015 Author Share Posted November 21, 2015 Even at 10 yards I couldn't trust it. Shot placement was still all over the place. Link to comment Share on other sites More sharing options...
Open1215 Posted November 21, 2015 Share Posted November 21, 2015 :-/ may be your barrel. I was shooting 124 in 38 super. Perhaps that was part of it? Link to comment Share on other sites More sharing options...
Sarge Posted November 21, 2015 Share Posted November 21, 2015 They are extreme HPEase up on the crimp? Too much can ruin the plating as well. Link to comment Share on other sites More sharing options...
ar15rick Posted November 21, 2015 Author Share Posted November 21, 2015 But why would the barrel group well when I put regular stock rounds? I think if it was the barrel then it wouldn't group with anything I shoot through it. Also the barrel has about 1000 rounds out of it. I think Sarge might be right and the copper is sheering off Link to comment Share on other sites More sharing options...
ar15rick Posted November 21, 2015 Author Share Posted November 21, 2015 They are extreme HPEase up on the crimp? Too much can ruin the plating as well. I will check the crimp as well. Thanks. Link to comment Share on other sites More sharing options...
Sarge Posted November 22, 2015 Share Posted November 22, 2015 But why would the barrel group well when I put regular stock rounds? I think if it was the barrel then it wouldn't group with anything I shoot through it. Also the barrel has about 1000 rounds out of it. I think Sarge might be right and the copper is sheering off Also keep in mind, reloading is fun but sometimes very perplexing. Your gun might just simply not like those bullets. Or the oal with those bullets. Or your powder with those bullets. Or your crimp with the bullets. Weight of the bullets. I guess my point is there are a ton of variables. In my testing when I changed oal by a mere 1/1000th my groups would tighten or loosen AND move from one place to another on the target such as 3 oclock, 10 oclock etc. I probably would loosen up the crimp a little and try again. Then I would start making them longer and shorter, add or drop powder as needed and keep testing. If they don't eventually start grouping I think the gun don't like them. Link to comment Share on other sites More sharing options...
ar15rick Posted November 22, 2015 Author Share Posted November 22, 2015 But why would the barrel group well when I put regular stock rounds? I think if it was the barrel then it wouldn't group with anything I shoot through it. Also the barrel has about 1000 rounds out of it. I think Sarge might be right and the copper is sheering offAlso keep in mind, reloading is fun but sometimes very perplexing. Your gun might just simply not like those bullets. Or the oal with those bullets. Or your powder with those bullets. Or your crimp with the bullets. Weight of the bullets. I guess my point is there are a ton of variables. In my testing when I changed oal by a mere 1/1000th my groups would tighten or loosen AND move from one place to another on the target such as 3 oclock, 10 oclock etc. I probably would loosen up the crimp a little and try again. Then I would start making them longer and shorter, add or drop powder as needed and keep testing. If they don't eventually start grouping I think the gun don't like them. Thank you. I will try all those things. I am also going to try montana gold. I hear that they should be better for the velocities that I am trying to reach to make major pf. Thank you all for the input. Link to comment Share on other sites More sharing options...
Sarge Posted November 22, 2015 Share Posted November 22, 2015 But why would the barrel group well when I put regular stock rounds? I think if it was the barrel then it wouldn't group with anything I shoot through it. Also the barrel has about 1000 rounds out of it. I think Sarge might be right and the copper is sheering offAlso keep in mind, reloading is fun but sometimes very perplexing. Your gun might just simply not like those bullets. Or the oal with those bullets. Or your powder with those bullets. Or your crimp with the bullets. Weight of the bullets. I guess my point is there are a ton of variables. In my testing when I changed oal by a mere 1/1000th my groups would tighten or loosen AND move from one place to another on the target such as 3 oclock, 10 oclock etc. I probably would loosen up the crimp a little and try again. Then I would start making them longer and shorter, add or drop powder as needed and keep testing. If they don't eventually start grouping I think the gun don't like them.Thank you. I will try all those things. I am also going to try montana gold. I hear that they should be better for the velocities that I am trying to reach to make major pf. Thank you all for the input.MG bullets are all I shoot in my open gun currently. I have some Xtremes I will load up for testing and practice and I have even shot a few BBI and blue bullets. While they are all fine bullets they really are not ideal in open for various reasons. You will find in the end you will be better served by true jacketed bullets for main diet Link to comment Share on other sites More sharing options...
ano Posted November 23, 2015 Share Posted November 23, 2015 I could repeadly hit a 12 by 12 inch gong gong at 313meters with mixed brass and plated bullets in my opengun. Link to comment Share on other sites More sharing options...
Gary Stevens Posted November 23, 2015 Share Posted November 23, 2015 Montana Gold 121 grain were exceptionally accurate in my gun. Link to comment Share on other sites More sharing options...
Steve RA Posted November 23, 2015 Share Posted November 23, 2015 Diameter of the bullets can also have a lot of bearing on how accurate they are. For years I've been using 130 gr LSWC which mike at .359 to .360. Thought I'd try some coated and they mike .356 and are horribly inaccurate, shot some more of the LSWC and back to excellent accuracy. No crimp on either, just straighten the case walls so they match a straight edge. Same brass, same load, same primers and OAL. Link to comment Share on other sites More sharing options...
Hi-Power Jack Posted November 24, 2015 Share Posted November 24, 2015 I repeadly hit a 12 by 12 inch gong at 313meters with plated bullets in my opengun. That is unbelievable ... How high do you aim? What power scope are you using? Link to comment Share on other sites More sharing options...
tcazes Posted November 26, 2015 Share Posted November 26, 2015 Xtremes have horrible accuracy for me as well. A friend of mines daughter did a science fair project on major pf accuracy. Xtremes were horrible, montana golds were cutting the same hole, precision delta was in second place with a nice Groupe but not cutting the same hole very often. And rainier etc were meh. All with 10 shot groups. I only use montana golds. They feed the best, preform the best. Just plain old the best imo Link to comment Share on other sites More sharing options...
ano Posted November 26, 2015 Share Posted November 26, 2015 I repeadly hit a 12 by 12 inch gong at 313meters with plated bullets in my opengun. That is unbelievable ... How high do you aim? What power scope are you using? No scope, just the c-more slideride 6moa, the point of aim was a bush/small tree that would move in the wind and was pretty bad to aim at really. not sure how high it was really, but spotter said something over 2 meters aprox. we were doing long range shooting match, PRS style and had some time to kick afterwords, had a good spotter behind me to call corrections, and I lay on the ground, with gun resting on .. well a rest bag. We were 3 shooters takeing turns spotting/shooting, all which put rounds on the plate (my gun) More interesting was how fast and accurate you could hit the general area within say 30 inches at high rounds of fire. ipsc geco had better accuracy than my 9 major rounds, but my 9 major was better than S&B and magtech. magtech had some weird fly aways and was not reliable at all. gun was SVI with schumann 5.5" barrel. Link to comment Share on other sites More sharing options...
truborshooter Posted November 26, 2015 Share Posted November 26, 2015 313 meters = 343.3 yards 6 moa dot is 20.4" dia at 343 yds Gong is 12" X 12" 124 at 1500 with 50 yd zero drops 138.8" (11.57 ') at 350 yds with a 26" drift with a 5 mph 90' wind down load a video Link to comment Share on other sites More sharing options...
Sarge Posted November 26, 2015 Share Posted November 26, 2015 That needs to be in the" you know you're a shooter when", thread. lol Link to comment Share on other sites More sharing options...
tcazes Posted November 26, 2015 Share Posted November 26, 2015 Lmao I know right. She just turned 13 and been shooting for a while. Needless to say her parents started her off right Link to comment Share on other sites More sharing options...
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