Mr F,
If I've understood your comments correctly, then I think it's a chrony issue.
You say your bullets are striking 1" higher, yet have lost 500 fps?? Something doesn't sound right.
Registered User
Mr F,
If I've understood your comments correctly, then I think it's a chrony issue.
You say your bullets are striking 1" higher, yet have lost 500 fps?? Something doesn't sound right.
“Junes1 is a whining bellend”
1" higher would make sense with a lower velocity load if he was measuring the maximum ordinate.Originally Posted by 220AI
In other words if he zeroed at 200 yards he would then expect something like 1" high at 100 yards. If he found that it was in fact 2" high at 100 yards on shooting the lower velocity is indicated.
weird one, losing 500fps seems almost impossible without maybe having used a much slower powder in the second set of loads.
Soot on the cases?
"An infinite number of monkeys banging away at type writers for an infinite period of time will eventually reproduce Hamlet" Thanks to discussion forums we now know this to be untrue.
Nfn rng w txt spk
There's also the simple fact that lower velocity rounds exit later in the recoil cycle. Certainly in pistol shooting, high strikes are generally a sign of reduced velocity.
...history... is, indeed, little more than the register of the crimes, follies, and misfortunes of mankind. (Edward Gibbon: Decline and Fall of the Roman Empire)
“Junes1 is a whining bellend”
low velocity pistol rounds sure, the OP mentioned the maximum ordinate in his OP in reference to a high velocity rifle however.
"An infinite number of monkeys banging away at type writers for an infinite period of time will eventually reproduce Hamlet" Thanks to discussion forums we now know this to be untrue.
Nfn rng w txt spk
Nevertheless, the centre of shoulder resistance is still below the centreline of the bore, so an upward couple will result on the muzzle in recoil. Principle is the same, though the effect is (much) more marked in pistols.
Fudd, I'm guessing you rezeroed the suspect load at 200 to find the 2" peak at 125? If you did, I suspect it was because you found it low at 200 at compared to the first batch zero?
Last edited by MikB; 19-07-2017 at 10:21 AM.
...history... is, indeed, little more than the register of the crimes, follies, and misfortunes of mankind. (Edward Gibbon: Decline and Fall of the Roman Empire)
“Junes1 is a whining bellend”
Indeed but I have never seen a rifle that shot lower with a faster load than with a slower, have you?
Were it not for the zero confirmation of the lower velocity I would have suspected that he had fallen foul of the chrony not be fully folded out for the first batch.
He must have rezeroed to get the higher maximum ordinate.
"An infinite number of monkeys banging away at type writers for an infinite period of time will eventually reproduce Hamlet" Thanks to discussion forums we now know this to be untrue.
Nfn rng w txt spk
Not sure. It was a while ago, but I think I got a high MPI with some .303 pussycat loads I was trying.
...history... is, indeed, little more than the register of the crimes, follies, and misfortunes of mankind. (Edward Gibbon: Decline and Fall of the Roman Empire)
Registered User
Flashheart you are exactly right, first batch chrono avg 3550fps zeroed at 200 yards, 1" high peak at 130 yards, yet with the new batch chrono avg 3060fps! and its 2" high at 125 yards!!??
Going to clean the barrel and then I'm starting my powder loads again as something is definitely a miss!
“Junes1 is a whining bellend”
Check you used the same powder from both mate, if it wasn't for the difference in the trajectory I would have said it was the chrono.
"An infinite number of monkeys banging away at type writers for an infinite period of time will eventually reproduce Hamlet" Thanks to discussion forums we now know this to be untrue.
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