Crosman's Premier hollowpoint - Part 2
Long-range accuracy test
by B.B. Pelletier
When I last tested this pellet, I was very surprised by the incredible performance it turned in. The expansion in Neutrogena soap was explosive, to say the least. You will recall that I had a transfer port limiter in the Whiscombe rifle to limit the Crosman Premier hollowpoint 7.9-grain pellet's average velocity to just 913 f.p.s.
Today, I want to report on accuracy I got with this pellet. Instead of testing it at an intermediate range, I shot it all the way out to 50 yards. That's where a pellet is made or broken, and I wanted to see just how good or bad this one was.
Adjusting the gun
Before I shot the CP hollowpoints, I adjusted the rifle's Harmonic Optimized Tuning System (HOTS), to see if there was any difference in grouping as the adjustable weight was moved. There was, but I'm saving that for another posting. Suffice it to say that I got the barrel in a sweet spot for the other pellets of known accuracy. That's not to say the barrel was tuned correctly for the Premier hollowpoint, but as I think you will see, it doesn't matter.
The average group with Crosman Premier hollowpoints was 1.207" center-to-center for five shots at 50 yards. All groups stayed within a tenth of an inch of this one. That is outstanding accuracy for a hollowpoint pellet at this distance. Now, remember, the HOTS was not adjusted for this pellet. It took me about an hour to optimize the barrel for a different, heavier pellet of proven accuracy, and I simply did not want to invest more time to tune it for this one. There's even more accuracy to be obtained with the right adjustment, but this test tells us what we need to know.
This is what the average group of Crosman Premier hollowpoints looked like at 50 yards. It measures 1.207".
What about supersonic?
Supersonic pellets have long been the bane of accuracy, even though advertised high velocity sells airguns left and right. I wanted to test the same Crosman Premier hollowpoint pellet from the same barrel, only this time accelerating it to supersonic velocity. The Whiscombe made it easy for me. All I had to do was remove the transfer port limiter and the 7.9-grain Premier blasted out of the muzzle at 1,108 f.p.s.! I knew by the sonic crack it was breaking the sound barrier every time. The firing behavior of the rifle also seemed to get a trifle harsher with the restrictor out.
Changing transfer port limiters changes the amount of air that flows through the port to power the pellet. It's a five minute operation that changes the firing behavior of the gun. The Whiscombe is an ideal testbed because of this feature.
I hunkered down and made certain my technique was perfect for the supersonic group, which, at 2.813", is almost 1.5" larger than the average subsonic groups and fully characteristic of what you can expect from going supersonic.
Breaking the sound barrier is easy for the Whiscombe. But, as you see here, you don't want to.
I'm leaving out a few things that happened because I'm saving them for tomorrow's next report on the rifle. But I will say that this was a very good shooting day, and I was very pleased with how this test went. Clearly, the Crosman Premier hollowpoint is a pellet you can use at long range.