Yagi Posted July 7, 2020 Share Posted July 7, 2020 (edited) Which one is more accurate ? Truncated Cone, Flat Nose or Round Nose in 9mm. Tell us your pistol set up. (Make, Model, Barrel, Barrel Length, etc.) Edited July 7, 2020 by Yagi Link to comment Share on other sites More sharing options...
4n2t0 Posted July 7, 2020 Share Posted July 7, 2020 (edited) No difference whatsoever. Edited July 7, 2020 by 4n2t0 Link to comment Share on other sites More sharing options...
191138sc Posted July 7, 2020 Share Posted July 7, 2020 19 minutes ago, Yagi said: Which one is more accurate ? Your barrel will tell you. Shoot them all and if possible various weights. Link to comment Share on other sites More sharing options...
Boomstick303 Posted July 7, 2020 Share Posted July 7, 2020 Bullet profile has not made much of any difference in accuracy of the different bullets I have tested. The only data I have seen on if one bullet was more accurate than another is in regards to lube grooves. Bullets of the same weight with lube grooves are longer than ones without the grooves. The data indicated there was a difference but it was minimal. The theory and it seems to be right (at least with the one report I read) was due to the bullets with lube grooves being longer the riffling of the barrel has more time to interact with the bullet. I have not tested bullets of the same profile and weight with and with out lube grooves to prove or disprove the report I read for my own experience. Other than that , I see bullet weight making more of a difference in accuracy out my Sig X5 Legions more than anything else. Still working out which weight to go with, 124 gr or 135 gr RN. My X5s hate 147 gr bullets in regards to accuracy. I have heard from others that have done testing they feel the same way about 147 gr bullets. Link to comment Share on other sites More sharing options...
iflyskyhigh Posted July 7, 2020 Share Posted July 7, 2020 I’m sure some one will disagree because you know...the internet...but I think there is an argument to be made that JHP on average are more accurate than FMJ, CMJ, plated, coated, or lead bullets. Then maybe CMJ? Lead and coated tend to be more accurate than plated (least accurate) for sure. To your question, between lead, coated, and FMJ profile probably doesn’t matter as much as the shooter and whether you gun likes em. And plated....meh. The only thing I use plated for is subsonic 9MM loads. They seem to be hot garbage in everything else. Not that much cheaper than FMJ’S or JHP’S but inferior projectiles. While it isn’t apples to apples, there is a reason the most accurate rifle bullets are boat tail hollow points. Some of that ballistic science applies to JHP pistol bullets. I have to many pistols and set ups to list, but across the board I’ve found this to be pretty much true. Exceptions of course always apply. Standing by for the incoming grenades.... Link to comment Share on other sites More sharing options...
Guy Neill Posted July 7, 2020 Share Posted July 7, 2020 Many years ago, the Air Force designed a more accurate 20mm projectile. Later, when they first started testing 9mm pistols, they concluded the bullets then available were not accurate enough for their tests. They got with Hornady and used the 20mm design process to design a new, supposedly, more accurate 9mm bullet. That was the 124gr Hornady truncated cone bullet. Hornady later used the design process for a new 45 bullet, resulting in the 45 truncated cone bullet - tha6t should actually should have been 235gr, but they kept it at 230gr. I've not been able to find the original Air Force research - assuming it was published in some paper or standard, but the concept was that the center of pressure needed to be in front of the center of gravity. Hollow points do that naturally, along with the truncated cones. All that said, I feel it still comes down to individual guns as well as the bullet. Some guns have distinct preferences for what they will shoot well. Generally, however, hollow points and truncated cones should be accurate. I have not seen anything about semi-wadcutters, but expect they are a modified truncated cone. Link to comment Share on other sites More sharing options...
IHAVEGAS Posted July 7, 2020 Share Posted July 7, 2020 I emailed Les Baer and asked what bullet they used for accuracy testing my 9mm premier 2 (got the guaranteed 1.5" groups at 50 yards gun, but not near that good with me shooting it unfortunately). Apparently federal 124 grain round nose is what they use. For what that is worth, does not answer the question but does tell me round nose is better than my ability to find what is best. Link to comment Share on other sites More sharing options...
AverageJoeShooting Posted July 7, 2020 Share Posted July 7, 2020 Whatever is cheapest. If you're shooting 50 yards you won't see any differences between bullet types Link to comment Share on other sites More sharing options...
MemphisMechanic Posted July 7, 2020 Share Posted July 7, 2020 7 minutes ago, AverageJoeShooting said: Whatever is cheapest. If you're shooting 50 yards you won't see any differences between bullet types Have you tried telling a bullseye competitior that? Link to comment Share on other sites More sharing options...
lll Otto lll Posted July 7, 2020 Share Posted July 7, 2020 Atlanta Arms most accurate ammo is the Elite 115 JHP 1.25" at 50 yards. (probably a Hornady) Second most accurate is their AMU 115 FMJ 1.50" at 50 yards. (probably a Sierra) I think what's most important is who manufactures the bullet as opposed to a particular profile. Link to comment Share on other sites More sharing options...
Cuz Posted July 8, 2020 Share Posted July 8, 2020 I’d say reliability in feeding is a more important factor in choosing a bullet profile than accuracy. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
4n2t0 Posted July 8, 2020 Share Posted July 8, 2020 45 minutes ago, Cuz said: I’d say reliability in feeding is a more important factor in choosing a bullet profile than accuracy. Ding, ding, ding...give that man a prize! Link to comment Share on other sites More sharing options...
AHI Posted July 8, 2020 Share Posted July 8, 2020 (edited) bullseye competitor Flat nose tends to be more accurate than TC winch tends to be more accurate than Round nose. but you must mach up bullet length(weight) to twist rate. shoot a 147gr bullet in a 1/32 twist and it will start tumbling at three feet. put a 115gr bullet in a 1/32 twist and 10 shots at 50 yards may be inside 1 in. for uspsa type shooting match up the weight then what ever feeds best. safe bet would be round nose. Edited July 8, 2020 by AHI Link to comment Share on other sites More sharing options...
superdude Posted July 8, 2020 Share Posted July 8, 2020 I have to agree with Guy. I've produced nice groups (from a Ransom Rest) with all shapes (with jacketed bullets), but the round nose, as a category, seem less consistently accurate. The most consistently accurate have been flat nose designs (FMJ or JHP), and of those the conical nose seem more consistently accurate than round nose flat point. Naturally, it depends on which specific bullet is used. These have been in 1911s with 5" Kart barrels. Link to comment Share on other sites More sharing options...
HOGRIDER Posted July 8, 2020 Share Posted July 8, 2020 10 hours ago, Yagi said: Which one is more accurate ? Truncated Cone, Flat Nose or Round Nose in 9mm. Tell us your pistol set up. (Make, Model, Barrel, Barrel Length, etc.) Not sure if this bullet is Truncated Cone or Flat Point; but they produced this grouping in my STI Gen1 Staccato P (4.15" barrel), at 20 yards, from a Ransom Rest: https://www.federalpremium.com/handgun/american-eagle/american-eagle-handgun/11-AE9FP.html Link to comment Share on other sites More sharing options...
Farmer Posted July 8, 2020 Share Posted July 8, 2020 Depends on bullet weight/bearing length. For 115g in my XDM a round nose is more accurate than the TC. When I get to 124g the TC is pretty good but a FN is better and a 135g TC is as good. Longer bearing length usually will give better accuracy unless the bullet as a whole is too long for your twist rate. Link to comment Share on other sites More sharing options...
AverageJoeShooting Posted July 8, 2020 Share Posted July 8, 2020 10 hours ago, MemphisMechanic said: Have you tried telling a bullseye competitior that? at a certain point its the shooter if your not hitting your target Link to comment Share on other sites More sharing options...
AHI Posted July 8, 2020 Share Posted July 8, 2020 (edited) double Edited July 8, 2020 by AHI Link to comment Share on other sites More sharing options...
AHI Posted July 8, 2020 Share Posted July 8, 2020 12 hours ago, AverageJoeShooting said: Whatever is cheapest. If you're shooting 50 yards you won't see any differences between bullet types Tell me about these cheep bullets that shoot x ring size groups at 50 yards. High Master Bullseye Competitor Link to comment Share on other sites More sharing options...
AverageJoeShooting Posted July 8, 2020 Share Posted July 8, 2020 1 hour ago, AHI said: Tell me about these cheep bullets that shoot x ring size groups at 50 yards. High Master Bullseye Competitor Ok let me revise the statement. For action pistol competition. Specifically uspsa and idpa. You will notice no difference in bullets since most shots on any given stage will be inside 30 yards. A super long shot is 50 yards and would probably be 1 target at that distance. I think the longest anyone ever shot in uspsa was 75 yards and it was 1 target on one stage. Link to comment Share on other sites More sharing options...
Yagi Posted July 8, 2020 Author Share Posted July 8, 2020 1 hour ago, AverageJoeShooting said: Ok let me revise the statement. For action pistol competition. Specifically uspsa and idpa. You will notice no difference in bullets since most shots on any given stage will be inside 30 yards. A super long shot is 50 yards and would probably be 1 target at that distance. I think the longest anyone ever shot in uspsa was 75 yards and it was 1 target on one stage. Was there not long distance target at the recently concluded 2020 USPSA PCC NATIONALS in FL? Link to comment Share on other sites More sharing options...
AHI Posted July 8, 2020 Share Posted July 8, 2020 2 hours ago, AverageJoeShooting said: Ok let me revise the statement. For action pistol competition. Specifically uspsa and idpa. You will notice no difference in bullets since most shots on any given stage will be inside 30 yards. A super long shot is 50 yards and would probably be 1 target at that distance. I think the longest anyone ever shot in uspsa was 75 yards and it was 1 target on one stage. Qk for the most part I will agree with you . Link to comment Share on other sites More sharing options...
AverageJoeShooting Posted July 8, 2020 Share Posted July 8, 2020 1 hour ago, Yagi said: Was there not long distance target at the recently concluded 2020 USPSA PCC NATIONALS in FL? Rifles have no place in a pistol competition. Also my statement reads "for action pistol competition" Link to comment Share on other sites More sharing options...
lll Otto lll Posted July 8, 2020 Share Posted July 8, 2020 18 hours ago, Cuz said: I’d say reliability in feeding is a more important factor in choosing a bullet profile than accuracy. The OP wasn't taking a poll on reliability.... Link to comment Share on other sites More sharing options...
IHAVEGAS Posted July 8, 2020 Share Posted July 8, 2020 1 hour ago, lll Otto lll said: The OP wasn't taking a poll on reliability.... It is an interesting aside though. Intuition suggests round nose, but I would not put money on it. Link to comment Share on other sites More sharing options...
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