.20cal air bullet update
the maker have tested some 48grn air bullets which were 18mm long. 48gr bullets started to tumble at 35m. soon discovered that their weight distribution was 40% front and 60% tail. With the same design in 40grn which were 15mm long there was no tumbling and accuracy was 1/2″ at 35m. These both had a 3/4 F shape nose (similar to that of a spitzer). With a 3/4 E shape nose (same as a 9mm) they can cut the length by about 2mm and maintain the same weight. they think that 40grn is pretty much the max weight they will be looking at. Speed will also increase spin and better the stablization so you will need a very powerful air rifle to shoot those 40grn bullets. they will have 30grn available for those with standard 25-35fpe FAC rifles. with modified BAM.20 they were shooting the 40grn at an ave of 920fps @ 75fpe. also claimed when the final mods done it should be shooting at 85fpe in .20cal!
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That they do! I’m interested in them because everything that I know tells me that they shouldn’t be stable, but if they can shoot sub 0.5″ at 35 Yards, then they seem to work okay. I think that a lot of testing would be in order.