Grouping Problem Answer
09-29-2009, 04:25 PM
#1
Fork Horn
Thread Starter
Join Date: Jul 2009
Location: Florida Panhandle
Posts: 119
Grouping Problem Answer
I got back out there today. Plan was to shoot a few at 8X scope power, then at 5x then 3x, then switch ammo from Remington to Nitrex. I wouldn't believe the results if I didn't see this myself.
First shot 8x @ 100 yds. Bullseye! Next two within 1" or so of the bullseye. Scope out to 3x. All on the paper but the group went out to about 4". I understand that because I can't see the target as well. Back to 8x. Two more near the bullseye with Remington, then a Nitrex. ...7-8 inches to the left! More Remingtons, right back on! Nitrex to the left! Go figure. I woul never have thoguht there'd be that much difference.
First shot 8x @ 100 yds. Bullseye! Next two within 1" or so of the bullseye. Scope out to 3x. All on the paper but the group went out to about 4". I understand that because I can't see the target as well. Back to 8x. Two more near the bullseye with Remington, then a Nitrex. ...7-8 inches to the left! More Remingtons, right back on! Nitrex to the left! Go figure. I woul never have thoguht there'd be that much difference.
09-30-2009, 01:08 AM
#3
Nontypical Buck
Join Date: Feb 2003
Location: west central wi USA
Posts: 2,256
Quite often two different brands will shoot in completely different spots with the same weight bullet. Differences in powder, primer, even casings will make the gun shoot differently. Also I always sight in with my scope on the power that I most likely will be hunting with. There are some scopes that will shift point of impact when you change power.
09-30-2009, 03:54 AM
#4
Fork Horn
Thread Starter
Join Date: Jul 2009
Location: Florida Panhandle
Posts: 119
Both were 165 grain bullets. Changing the scope from 8X to 3X didn't move the group. It just got bigger (less magnification, harder to see, I guess). Really weird, but I've done it twice now, so I'll stick with the one that is dead on. I'm sure if I adjusted my scope to move the Nitrex bullet to the right, I'd shoot as good with them. Go figure...
09-30-2009, 06:59 AM
#6
Nontypical Buck
Join Date: Aug 2005
Location: S.W. Pa.-- Heart in North Central Pa. mountains-
Posts: 2,600
Even when handloading, when switching from one powder to another using the same bullet, primer and casing when working up a load quite often causes a noticeable difference in POI. Same can happen when keeping all the components the same but switching bullets wt. for wt. It is, indeed, common, like statjunk says.
09-30-2009, 08:35 AM
#7
Typical Buck
Join Date: Feb 2004
Location:
Posts: 809
It does happen
Even when handloading, when switching from one powder to another using the same bullet, primer and casing when working up a load quite often causes a noticeable difference in POI. Same can happen when keeping all the components the same but switching bullets wt. for wt. It is, indeed, common, like statjunk says.
Note: If you find something off the shelf that shoots well in your firearm, you might want to stock up with the particular lot #, the next lot may not work as well for you.
