I have a 7 twist 243 that is doing funny things at 1k yards. Im running 3260fps so thats 335,000 rpm. Has anyone ever had similar rpm cause odd things to happen? The e targets say that 400fps slower rounds hit 1/2mil high. Thats not logical!!! Also the 400fps is not logical, you could get better ES loading powder with a damn coffee spoon!!!!But if it was for lack of a better idea melting or wobbling then maybe????
Anyone ever over rpm a bullet
- Thread starter Shawnba67
- Start date
Dusty Stevens
Shiner
I can make a bullet smoke with a 243 and a 7tw barrel. Slow it down. Youre either destroying the bullet or its going subsonic thru the target.
I have no idea what happens to the ones the target doesn't register. I dont see anything but my lack of recoil management doesnt keep me on target. With multiple guys on same target i cant go count holes even. I tried after match but i couldnt tell 6's from 6.5's holes on the board.
I had a 30 inch, 7 twist .223 barrel that would 'poof' everything I put thru it, including 80 grain SMK's if the velocties were anywhere near or above 3000 fps. 52 grainers would make a grey halo about 25 yards down range, the heavier bullets MIGHT make it to a 100 yard target, but would leave grey 'comet tail' streaks around the hole. Turned out to be, best we could determine, an extremely rough edge on one of the lands about halfway down..the barrel maker made it good, and the replacement is a tack driver.
now Im not a fantastic shot, but there is enough evidence of a pattern here for me at least. A lot of noncorresponding noise also. But most of the high ones show a lowered fps, most of low show higher. I pulled a few shots, but i only had 3-4 called shots outside the 9 ring.Look at s1 5,8,10,13,14.
Now at s7,s9,6,15,20. My ability clouds it but how in the heck is/could this be happening? Im prwtty sure Its some kind of failure. This load does not have 400fps of es at the muzzle either.
FOR SURE IM CHANGING BULLETS FOR STARTERS BUT I WANT TO KNOW WTH IS HAPPENING ALSO. Thanks
Do you know how far out they blew up? I have had zero failures to make a 100yd target. I have only shot 100 and 1000yds.
okie
Gold $$ Contributor
mine doesnt blow them up until my barrel gets fouled or hot. not sure if heat or fouling does it, since it happened on pdog hunt--I just shoot until one poofs then clean---takes 20 plus shots--not sure if this helps...?? I am way over spinning them---spectacular mist--85 gr 6.5 in 8 tw.--.284 case running hot
Ballpark they come apart at 200-400 yards. Generally, in a puff of white smoke. Had the opportunity to score for a top level shooter experiencing the problem at a 600 yard match. Watched a few come apart in my spotting scope. Fast twist.... rough bore, bad jackets. Or all the above.
many years ago I did. I read Ackleys books, and got the bug to build a 22-378 Wby AI. 8" twist, by time I saw 4000fps on my 35P I was seeing vapor trails about half the time.
I could smoke every bullet out there, except the Nosler solid base 60gr bullets. Got to 4600fps before pressure stopped me.
I could smoke every bullet out there, except the Nosler solid base 60gr bullets. Got to 4600fps before pressure stopped me.
223wssm&50 gr bullits at 4000+ fps & 10 twist barrel will make white puffs inside of 50 yds.
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