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Joined: Apr 2017
Posts: 636
Campfire Regular
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OP
Campfire Regular
Joined: Apr 2017
Posts: 636 |
So last winter I acquired a 98 that was rebarreld to a 308 win and had alot of work done to it, when i acquired it from the estate it had a shifty scope etc. so I finally got around to mounting a scope and shooting it recently, i have some handloads from a different project that didn't work out, they were Hornady 150 sst loaded close to the top of the chart which my 99 savages did not like, this gun with a 24 inch barrel and the rock solid 98 action loves them and does what is expected, very nice grouping. For the heck of it I run three 150 grain speer rounds loaded very moderately thru it just to see how much difference, up and down was not that much difference at 100 yards but they grouped 5 inches to the left, I was expecting up and down movement not left to right, is this a normal happening, I guess when I tried this I never seen this left to right movement before. Thanks in advance for any thoughts on this.
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Joined: Aug 2005
Posts: 5,509
Campfire Tracker
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Campfire Tracker
Joined: Aug 2005
Posts: 5,509 |
I saw horizontal differences in point of impact of 3-4" last month when shooting varmint vs. deer loads in a Mauser. 5" wouldn't shock me.
"Live like you'll die tomorrow, but manage your grass like you'll live forever." -S. M. Stirling
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Joined: Sep 2006
Posts: 23,631
Campfire Ranger
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Campfire Ranger
Joined: Sep 2006
Posts: 23,631 |
I have trouble understanding your surprise that significantly different loads shoot to different POI's no matter which direction they are different.
Lower velocity alone, given different powders & different bullets, are not guaranteed to shift POI only up or down...............................just sayin'.,
MM
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Joined: May 2003
Posts: 10,430
Campfire Outfitter
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Campfire Outfitter
Joined: May 2003
Posts: 10,430 |
Just shows you how much barrels flop around when you go bang. And why it's important to make consistent loads with small extreme velocity spread. That gun should be a good teacher for you. Here's to an A on final exam!
Up hills slow, Down hills fast Tonnage first and Safety last.
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Joined: Dec 2007
Posts: 5,500
Campfire Tracker
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Campfire Tracker
Joined: Dec 2007
Posts: 5,500 |
In the same but opposite direction(???), I was shocked when two different people I know had no concern about going from one brand to another, without checking results on paper . . . After all they were the same bullet weight. One other person I know brought me his Model 70 (High Power competition gun for previous owner) and three boxes of ammo to help him sight it in. Three different brands and 2 different bullet weights.
One should never be surprised in the location of a group from a different brand, bullet weight, loading.
Shoot it and see what it does. Meet your predictions?
Last edited by LouisB; 12/17/20.
Some spelling errors can be corrected by a vowel movement. ~ MOLON LABE ~
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Joined: Jan 2009
Posts: 310
Campfire Member
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Campfire Member
Joined: Jan 2009
Posts: 310 |
This is the reason a lot of us reload, repeatability. I have seen significant shift in poi from one lot to another of the same Ammo. And it can happen to reloaders when we change lots of powder or even primers. That is the reason we sight rifles in every so often.
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