billdncn Posted May 5, 2007 Share Posted May 5, 2007 Can any of you make suggestions for my friend? Here is his question -------------------------------------------------------------------------------------- I have a question, maybe you can answer. As you know i am using the glock 34. I have a 12# recoil spring and the usual parts that came with it. ie 3.5# connector ect.... I shoot a 147 grain subsonic round from federal. In rencent tests i have found that i am getting better groups with plain old 115 grain box ammo than i am with the 147 grain. I am not sure if the recoil between the two rounds is really that different. In general i should be doing better with the 147 grain stuff because there should be less recoil. but this is not the case. Any ideas why this is? I have cronographed the ammo and the 147 grain " subsonic " round is really not subsonic out of my g34. Its comming out at about 1007-1011 fps. -------------------------------------------------------------------------------------- Thanks guys. I made a few suggestions to him (try stock spring setup, see how they do out of his G17, etc.), but I wanted to see what you guys thought. Link to comment Share on other sites More sharing options...
Joe D Posted May 5, 2007 Share Posted May 5, 2007 He needs to learn to reload the 147 gr bullets or buy the 147 gr load from Atlanta Arms. A 147 gr bullet at 875 fps is way softer than factory 115. Link to comment Share on other sites More sharing options...
billdncn Posted May 5, 2007 Author Share Posted May 5, 2007 He needs to learn to reload the 147 gr bullets or buy the 147 gr load from Atlanta Arms. A 147 gr bullet at 875 fps is way softer than factory 115. Agreed. I told him that at the same PF the recoil would be different. With 115's being sharper. I also told him that there is a big difference between a 147 @ 148PF as opposed to say 130PF. He is thinking about reloading, and asking questions, which is good. Until then, I'll suggest he try AA's 147's. Thanks Link to comment Share on other sites More sharing options...
Flexmoney Posted May 5, 2007 Share Posted May 5, 2007 Tell him to send me a few thousand rounds of each to test in my G34. Seriously, if he shoots better with the 115's...he should shoot the 115's. Link to comment Share on other sites More sharing options...
billdncn Posted May 5, 2007 Author Share Posted May 5, 2007 Tell him to send me a few thousand rounds of each to test in my G34. Will do Seriously, if he shoots better with the 115's...he should shoot the 115's. Yep. I guess if he's going to shoot factory, he'll need to test different brands and styles. In the meantime, shoot what works. I'm guessing his barrel may not like the 147's above supersonic vel. That's why I suggested he try them in his G17. Does that make any sense, or am I way off Link to comment Share on other sites More sharing options...
luxor Posted May 5, 2007 Share Posted May 5, 2007 Tell him to send me a few thousand rounds of each to test in my G34. Will do Seriously, if he shoots better with the 115's...he should shoot the 115's. Yep. I guess if he's going to shoot factory, he'll need to test different brands and styles. In the meantime, shoot what works. I'm guessing his barrel may not like the 147's above supersonic vel. That's why I suggested he try them in his G17. Does that make any sense, or am I way off Hey Guys, I am the friend bill is refering to. I probably should elaborate on this some. What i was trying to say was that i am shooting better groups with 115 vs 147 because i am obtaining a quicker sight picture with the lighter stuff. The gun shoots fine with either ammo. I have shot alot of dannys ammo and currently have an order in route. this should fix my problem, as atlanta arms ammo crono's a lot less in velocity than the federal 147 does. I have heard the same comment from alot of guys about this very same thing. The 115's are moving the slide alot quicker there for i am getting back on target quicker. Does this make sense?. I really can't tell any differance in felt recoil between the two, so i am going to shoot the 115's till dannys ammo gets here. Thanks for the help guys. Link to comment Share on other sites More sharing options...
Joe4d Posted May 5, 2007 Share Posted May 5, 2007 Any ideas why this is? I have cronographed the ammo and the 147 grain " subsonic " round is really not subsonic out of my g34. Its comming out at about 1007-1011 fps. Sound is 1116 fps at sea level at 70 degrees f. So your ammo is subsonic. I'm gonna agree with your friend though, I know the conventional wisdom is heavy bullets for limited I allways liked the feel and seem to do better with the lighter bullets at the same powerfactor, In general I like the lightest bullet that will make power factor while staying subsonic. Link to comment Share on other sites More sharing options...
Micah Posted May 5, 2007 Share Posted May 5, 2007 Seriously, if he shoots better with the 115's...he should shoot the 115's. +1. Even if it is just perceptual, he'll save money. Link to comment Share on other sites More sharing options...
billdncn Posted May 5, 2007 Author Share Posted May 5, 2007 Hey Guys, I am the friend bill is refering to. I probably should elaborate on this some. What i was trying to say was that i am shooting better groups with 115 vs 147 because i am obtaining a quicker sight picture with the lighter stuff. The gun shoots fine with either ammo. I have shot alot of dannys ammo and currently have an order in route. this should fix my problem, as atlanta arms ammo crono's a lot less in velocity than the federal 147 does. I have heard the same comment from alot of guys about this very same thing. The 115's are moving the slide alot quicker there for i am getting back on target quicker. Does this make sense?. I really can't tell any differance in felt recoil between the two, so i am going to shoot the 115's till dannys ammo gets here. Thanks for the help guys. luxor, I hope you don't mind me posting, or asking about your situation here. These guy's are good, and can help with a lot of different problems. I didn't know you'd be here. Take'er away, and good luck Did you get the directions to Fredericksburg I sent? Link to comment Share on other sites More sharing options...
luxor Posted May 5, 2007 Share Posted May 5, 2007 Hey Guys, I am the friend bill is refering to. I probably should elaborate on this some. What i was trying to say was that i am shooting better groups with 115 vs 147 because i am obtaining a quicker sight picture with the lighter stuff. The gun shoots fine with either ammo. I have shot alot of dannys ammo and currently have an order in route. this should fix my problem, as atlanta arms ammo crono's a lot less in velocity than the federal 147 does. I have heard the same comment from alot of guys about this very same thing. The 115's are moving the slide alot quicker there for i am getting back on target quicker. Does this make sense?. I really can't tell any differance in felt recoil between the two, so i am going to shoot the 115's till dannys ammo gets here. Thanks for the help guys. luxor, I hope you don't mind me posting, or asking about your situation here. These guy's are good, and can help with a lot of different problems. I didn't know you'd be here. Take'er away, and good luck Did you get the directions to Fredericksburg I sent? Bill, No i don't mind at all. Guys bill is a good guy and has helped me out on a lot of gun related problems. I have been shooting for quite a while but am new to uspsa. I usally shoot idpa, three gun, ect... So again thanks for all the help. luxor. Link to comment Share on other sites More sharing options...
nphd2000 Posted May 7, 2007 Share Posted May 7, 2007 I also find that I have better groups when I shoot ammo with a quicker recoil "impulse". I prefer a slap not a push and then the sights settle faster. I've also noticed some barrels just don't like certain bullets (which I thought was BS when I first starting shooting) As the old saying goes "If it feels good..............Do it!" Shoot what works for you. Link to comment Share on other sites More sharing options...
Joseph796 Posted May 10, 2007 Share Posted May 10, 2007 I also find that I have better groups when I shoot ammo with a quicker recoil "impulse". I prefer a slap not a push and then the sights settle faster. I've also noticed some barrels just don't like certain bullets (which I thought was BS when I first starting shooting)As the old saying goes "If it feels good..............Do it!" Shoot what works for you. THIS IS WHAT I FOUND. THE 147'S WILL GIVE YOU A SLOWER BUT GREATER MUZZEL RAISE. THE 115'S WILL GIVE YOU A SNAPPIER RECOIL BUT THE MUZZLE RAISE WILL BE LESS. YOU NEED TO FIND OUT WHICH TYPE OF RECOIL SUITS YOU THE BEST. Link to comment Share on other sites More sharing options...
Joe D Posted May 10, 2007 Share Posted May 10, 2007 I have not found that to be the case. A 147 at 875 fps is softer and has much less muzzle rise than any 115 factory load I have ever tried. Link to comment Share on other sites More sharing options...
ima45dv8 Posted May 10, 2007 Share Posted May 10, 2007 I have not found that to be the case. A 147 at 875 fps is softer and has much less muzzle rise than any 115 factory load I have ever tried. Same here. Link to comment Share on other sites More sharing options...
Aircooled6racer Posted May 11, 2007 Share Posted May 11, 2007 Hello: If you change the recoil spring you can change the muzzle flip as well. You may try different recoil springs till you find the right one for you. On my STI I use two different springs for major or minor loads and also different bullet weights. Buy some springs and have some fun. Hope this helps. Thanks, Eric Link to comment Share on other sites More sharing options...
Flexmoney Posted May 11, 2007 Share Posted May 11, 2007 We've went from "hey..this guns doesn't run"...to "which rounds shoot softest". I'll just add this. Properly grip the gun and none of this proably matters. Pick one and practice. Link to comment Share on other sites More sharing options...
Chuck Merriam Posted May 11, 2007 Share Posted May 11, 2007 I am with Pharaoh Bender...... I just switched to a DOH in Limited because I got the sensation I was going to knock the gun from my Ghost. It is probably just perceptual...but on the other hand I go at the gun harder making me maybe faster......I just shot stage 2 at the Area 6 faster than Shannon Smith.....of course he beat me by one point. And I am no GM. Many people like snappier guns.....a good happy medium for you may be the 125's if you are going to reload. Because I too do not really care for the feel of the 147's! Link to comment Share on other sites More sharing options...
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