Did you try the old test of seeing how far a bullet would fit down the muzzle? The bullet could be loose in the bore.

 

Yes but as expected they don't fit. The rounds are factory PPU which purportedly are the correct size for the gun.

 

rotate the rear sight blade fully onwards and use the bottom V,notch

aim placing the tip of the front sight at the bottom of the V notch

probably you'll have to aim lower

if possible try different cartridges with heavier bullets and not spitzer bullets, especially at longer distances

 

This is probably what I will need to do. They were out of the heavier bullets but will try again next week.

 

Some of my observations and strategies to get them working:

 

Thanks for posting those videos I will give them a watch!

 

Which bullets are you using, .264's or .268's? With .264's I can expect two shots to go towards opposite ends of the paper at 25y. With .268's this was a group at 50y. Shooting it out to 100 is still a challenge for me. The .268 fmj's perform much better than .268 sp's for me.
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Also this is how the sights were designed to be used.

 

They will shot very high . Mine need a very tall front sight to hit where aimed . Try using a very large target to find out where it is hitting . If the bullets holes are round and close together there is nothing wrong with the gun . Put some soft clay on the front sight to make it higher to hit where you want then you can do something more durable later .

 

Did you try bore sighting for comparison?

 

Another Interesting video by someone who did not know what he is doing . Poor info and little knowledge of reloading . After test firing many different load combinations through 22 different Carcanos my results show everything he did is wrong . The Italians DID change their bore size and rifling type in later rifles . One of my M-91 Cav carbines is one of my most accurate of the group . With the right load the Hornady 160 .264 bullet shoots fine . But then again I tried about 20 different powders , velocities and bullet . The PPU bullets also did well . I shot all my 5-shot groups at 100 yards as 50 yard groups are useless . Since 100 yard groups are a minimum of 3x the 50 yard groups and 5 shot groups are double in size of 3 shot , he was shooting was really bad [ a real world 12 inch + 100 yard group ] . All my Carcanos ran from 2.5 to 4 inch 100 yard group averages with good loads . And yes there is a way to make the Hornady solid base bullets a hollow base , just run them into a .266 bullet making mold backwards .