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Scorch · May 22, 2007, 01:15 PM

What you are seeing is the effect of recoil OR harmonics. EITHER the bullet stays in the barrel longer, so the barrel is pointed higher when the bullet finally clears the muzzle OR the harmonics have the muzzle pointed in a different direction when the bullet finally clears. I have 2 loads for my 22-250 (IMR 3031 and WW760 powders), they chrono within 30 fps of each other, yet the POI of the 3031 load is about 4"left and 1" below the POI for the 760 load. Both accurate, both good loads. Read Varmint Al's page on harmonics for an in-depth explanation.

For more info on optimum barrel length, Google "Houston warehouse".

For real accuracy, get a 22lLR barrel.

May 22, 2007, 01:15 PM	#2
Scorch Senior Member Join Date: February 13, 2006 Location: Washington state Posts: 15,248	What you are seeing is the effect of recoil OR harmonics. EITHER the bullet stays in the barrel longer, so the barrel is pointed higher when the bullet finally clears the muzzle OR the harmonics have the muzzle pointed in a different direction when the bullet finally clears. I have 2 loads for my 22-250 (IMR 3031 and WW760 powders), they chrono within 30 fps of each other, yet the POI of the 3031 load is about 4"left and 1" below the POI for the 760 load. Both accurate, both good loads. Read Varmint Al's page on harmonics for an in-depth explanation. For more info on optimum barrel length, Google "Houston warehouse". For real accuracy, get a 22lLR barrel. __________________ Never try to educate someone who resists knowledge at all costs. But what do I know? Summit Arms Services