Lots of good advice so far.
I've done the same thing with a few rifles. First off I personally like to shoot these types of ammo tests indoors to avoid wind and other issues. 25-50 yards is fine. If shooting 25 yards it just means you're looking at a smaller amount of error.
Ammo I've found to be the type of accuracy you are looking for: Lapua Super club (now a different name but I'm still running my old stuff), CCI Standard, and Federal Gold (711B only as the other loading is exactly the same as American Eagle 40 grain and shoots the same). If the rifle doesn't shoot Lapua then it will probably shoot the Federal Gold and or CCI standard. There are of course a bunch of other ammo brands to try but most are plinking or varmint ammo. Fun for initial sight in and gongs at 200 yards etc. Not precision 22LR ammo. Or in this case accurate but not extreme precision. One note with the Federal Gold. There are a couple different loads. The packages all look the same but the load will be listed on the side. 911, 711b etc. Check the load. One is exactly the same as American Eagle 40 grain and is a waste of money. The other in my Kimber SVT shot very well.
Also on a side note it seems the most accurate ammo out of many of my 22LR rifles always shoots low and to the left. Which brings me to my suggestion. For an ammo test I use the competition targets. I sight in with American Eagle 40 grain. Do a group or two to get my shooting inline. I keep that target up usually underneath the good ammo test target. Then I shoot on the good targets. 5 rounds. Three swipes with a bore snake and the next ammo. A couple shots on the practice target to get the barrel seasoned. Then 5 on the good target.
I have found if I shoot Lapua or Elley or any other match type ammo with heavy lube that the next round no matter what it is will shoot pretty much the same as the lubed ammo. POI will be the same. Then a couple shots later it will be drastically different. So the bore snake a few times and seasoning the barrel is important.
One last point. The ammo for 25-50 yards might not be what your rifle shoots best at 100 yards. So it's worth having a couple of loads, or keep one setup as your favourite indoor winter gun and the other for longer ranges. Just something to think about. This is for medium level accuracy rifles. If you want to go hardcore 22LR accuracy read Eagleye's threads. That's another level up from what we're talking about here.
Here's an example of an ammo test using a Kimber SVT with Leupold EFR 6.5-20x scope indoors at 20 metres. You can see the "flyers" as I only ran the bore snake through twice and didn't season the barrel. As it turns out that particular Federal Gold was the right round for it and I've some dead on one shot at each targets with it once I settled on that ammo. IE the rifle becomes more accurate as the one type of ammo is used. But you can see the results of my cutting a few corners.
One shot with the Kimber SVT. This is the most recent target and was done a couple of years ago. One thing to note was that in this last one I was shooting indoors at a bench connected to a line of stalls with others shooting. This sucks as I have seen the crosshairs vibrate as others bump their shooting station etc. So not ideal. The errors on this target are most likely me, but I may have had some help. I miss the days of up North indoors heated and the only one there. Much easier.
One shot each target using K10/22T Ruger 14x indoors 20 metres. This was after the ammo tests in which I found my rifle likes Lapua Super club. Target was horizontal not vertical when shot. You can see the left and right are slightly out. That's the degree of error that I'm looking for and trying to figure out.
There's lots of ways to do this. These are just some suggestions that might help.
I've done the same thing with a few rifles. First off I personally like to shoot these types of ammo tests indoors to avoid wind and other issues. 25-50 yards is fine. If shooting 25 yards it just means you're looking at a smaller amount of error.
Ammo I've found to be the type of accuracy you are looking for: Lapua Super club (now a different name but I'm still running my old stuff), CCI Standard, and Federal Gold (711B only as the other loading is exactly the same as American Eagle 40 grain and shoots the same). If the rifle doesn't shoot Lapua then it will probably shoot the Federal Gold and or CCI standard. There are of course a bunch of other ammo brands to try but most are plinking or varmint ammo. Fun for initial sight in and gongs at 200 yards etc. Not precision 22LR ammo. Or in this case accurate but not extreme precision. One note with the Federal Gold. There are a couple different loads. The packages all look the same but the load will be listed on the side. 911, 711b etc. Check the load. One is exactly the same as American Eagle 40 grain and is a waste of money. The other in my Kimber SVT shot very well.
Also on a side note it seems the most accurate ammo out of many of my 22LR rifles always shoots low and to the left. Which brings me to my suggestion. For an ammo test I use the competition targets. I sight in with American Eagle 40 grain. Do a group or two to get my shooting inline. I keep that target up usually underneath the good ammo test target. Then I shoot on the good targets. 5 rounds. Three swipes with a bore snake and the next ammo. A couple shots on the practice target to get the barrel seasoned. Then 5 on the good target.
I have found if I shoot Lapua or Elley or any other match type ammo with heavy lube that the next round no matter what it is will shoot pretty much the same as the lubed ammo. POI will be the same. Then a couple shots later it will be drastically different. So the bore snake a few times and seasoning the barrel is important.
One last point. The ammo for 25-50 yards might not be what your rifle shoots best at 100 yards. So it's worth having a couple of loads, or keep one setup as your favourite indoor winter gun and the other for longer ranges. Just something to think about. This is for medium level accuracy rifles. If you want to go hardcore 22LR accuracy read Eagleye's threads. That's another level up from what we're talking about here.
Here's an example of an ammo test using a Kimber SVT with Leupold EFR 6.5-20x scope indoors at 20 metres. You can see the "flyers" as I only ran the bore snake through twice and didn't season the barrel. As it turns out that particular Federal Gold was the right round for it and I've some dead on one shot at each targets with it once I settled on that ammo. IE the rifle becomes more accurate as the one type of ammo is used. But you can see the results of my cutting a few corners.
One shot with the Kimber SVT. This is the most recent target and was done a couple of years ago. One thing to note was that in this last one I was shooting indoors at a bench connected to a line of stalls with others shooting. This sucks as I have seen the crosshairs vibrate as others bump their shooting station etc. So not ideal. The errors on this target are most likely me, but I may have had some help. I miss the days of up North indoors heated and the only one there. Much easier.
One shot each target using K10/22T Ruger 14x indoors 20 metres. This was after the ammo tests in which I found my rifle likes Lapua Super club. Target was horizontal not vertical when shot. You can see the left and right are slightly out. That's the degree of error that I'm looking for and trying to figure out.
There's lots of ways to do this. These are just some suggestions that might help.
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