A while back JSB shared this with us (I think it was originally on their facebook page).
BCs from most of what JSB offers, stated to have been collected from their company test facility (with the slight annoyance of reporting in their Euro-centric gms and meters/second).
With the caveat that BCs are very condition specific (and even barrel specific) this little chart has generated a lot of discussion amongst myself and airgunning friends. Discussion mainly revolving around how to get the pellet precisely where we want it down range, expressly WAY down range (relative to pellets). Between long range pdog pesting, Xtreme Field Target, EBR, and just the intrigue that comes with long range airgunning ACCURATELY, we were quite interested in seeing this comparison between so many different pellets.
I made a red dash to the right of all the standout BCs, as reported by JSB. With the volume in which I like to shoot, and the cost prohibitive nature of the larger small bore stuff (.25 and up), I've personally been most interested in the .22 and .20 offerings.
For .22 the highest BCs reported by JSB were:
For .20 the 15.89 Heavies being listed at 0.047 struck me as oddly high, as it is not too far behind the best .22 (Monster RD's). Many of the top big competition (EBR/RMAC/Xtreme FT/ETC) competitors run the .22 Monster RDs, and the .20 Heavies BC is only slightly less?!?! You've got my interest JSB.
Fast forward a year (house sale, house purchase, house remodel, etc) and I finally had some time to collect some BCs of the Heavy .20s this evening. Temps in the high 60s, humidity at 60% (AZ monsoon season), and elevation of 5600ft.
I first tried them with a muzzle velocity averaging 866 for about 26.5fpe (all 5 shot averages). They were still going 727fps at 54 yards so that gives them a BC of 0.039, which is....lackluster, and more in line with what I expected.
Next I tried them at a muzzle velocity averaging 908 for about 29fpe. They were still going 793fpe at 54 yards so a BC of 0.0495. Hey now! "That's the stuff!" I thought to myself, more in line with what JSB collected, and explains why these were hanging with the MRDs at paper in wind at 100ish yards a few weeks ago.
It looked like it was gonna rain on me at this point so I put everything away and had some family come over around then. After they left and the storm blew itself out I decided that I better verify that wasn't a fluke. Got everything out again and repeated the experiment. Got an average muzzle velocity of 912.7 and ended up with the far distance at 56 yards this time, and an average 56 yard speed of 784fps, working out to a BC of 0.0458, still promisingly high.
So, I averaged out the two for a BC of 0.04765 (0.048-just about what JSB reports) and plugged that into Strelok and plugged the clicks into the scope, and stretched it out a bit.
These were at 90 yards, 5 shots per paddle, no sighters, just Strelok data and 15 shots in a row. Shooting from a folding plastic table, with my knee riser acting kind of like a monopod (not very stable) and no rear rest (non trigger hand under the rear of gun).
I'm pretty excited for the .20 Heavies to be my budget long ranger now. I enjoy stretching out the .22 Monster RDs, but they're not quite as cheap as the .20 Heavies (and tough to get lately).
Takeaways.....
I've always read about people reporting better accuracy/bc/etc from pellets at an optimal speed from a specific barrel/gun, but had yet to see it so drastically as this evening. Nor had I ever had the desire to sit down and do comparisons. The 0.039 BC at around 26fpe is pretty ho-hum, but the 0.047 BC at around 29fpe is something to get excited about. So, if really hunting a high BC, shooting at various speeds to determine what fps gives the best comprise of BC, FPE, accuracy, and efficiency is well worth the time and effort.
There's still a little magic in the ole worn out, yesteryear's Silver Streak fodder, "on-the-way-out" .20 caliber. I'm glad I bought a bunch of the Heavies!
(yeah that's rising flood water in the back of the photo with the paddles, had and still having (at 130am) some drama around here this evening with concerns of it flooding out the newly renovated house, and actually flooding out some of my neighbors)
As a semi-related aside, I also collected some BCs from the 13.73gr .20s at my field target legal muzzle velocity average of 795 and 54 yard average of 670 for a BC of 0.039, pretty dang high for a field target legal configuration (although shouldnt come as a surprise since JSB reports 0.04 in their table).
Also generally interesting to look at the speeds JSB reported for each pellet in their BC testing. Makes a guy wonder how they arrived at those speeds. In my particular case, I was shooting the Heavies 25-30fps faster than they did.
Another one to note, LOTS of 270-290m/s listed on there.
Fun stuff.
BCs from most of what JSB offers, stated to have been collected from their company test facility (with the slight annoyance of reporting in their Euro-centric gms and meters/second).
With the caveat that BCs are very condition specific (and even barrel specific) this little chart has generated a lot of discussion amongst myself and airgunning friends. Discussion mainly revolving around how to get the pellet precisely where we want it down range, expressly WAY down range (relative to pellets). Between long range pdog pesting, Xtreme Field Target, EBR, and just the intrigue that comes with long range airgunning ACCURATELY, we were quite interested in seeing this comparison between so many different pellets.
I made a red dash to the right of all the standout BCs, as reported by JSB. With the volume in which I like to shoot, and the cost prohibitive nature of the larger small bore stuff (.25 and up), I've personally been most interested in the .22 and .20 offerings.
For .22 the highest BCs reported by JSB were:
- the 25.4gr Monster RDs @ 0.053 (the standout for me)
- the 34gr Jumbo Beasts @ 0.05 (I've not heard of anybody getting these to shoot very well, and I don't have a gun with the oomph necessary)
- the Original 25.4 Monsters @ 0.047 (again, they simply don't shoot very well)
- the 18.13grainers @ 0.042 (I've never got them to measure this high when doing the fps collected at 2 distances method-usually 0.035 or less)
For .20 the 15.89 Heavies being listed at 0.047 struck me as oddly high, as it is not too far behind the best .22 (Monster RD's). Many of the top big competition (EBR/RMAC/Xtreme FT/ETC) competitors run the .22 Monster RDs, and the .20 Heavies BC is only slightly less?!?! You've got my interest JSB.
Fast forward a year (house sale, house purchase, house remodel, etc) and I finally had some time to collect some BCs of the Heavy .20s this evening. Temps in the high 60s, humidity at 60% (AZ monsoon season), and elevation of 5600ft.
I first tried them with a muzzle velocity averaging 866 for about 26.5fpe (all 5 shot averages). They were still going 727fps at 54 yards so that gives them a BC of 0.039, which is....lackluster, and more in line with what I expected.
Next I tried them at a muzzle velocity averaging 908 for about 29fpe. They were still going 793fpe at 54 yards so a BC of 0.0495. Hey now! "That's the stuff!" I thought to myself, more in line with what JSB collected, and explains why these were hanging with the MRDs at paper in wind at 100ish yards a few weeks ago.
It looked like it was gonna rain on me at this point so I put everything away and had some family come over around then. After they left and the storm blew itself out I decided that I better verify that wasn't a fluke. Got everything out again and repeated the experiment. Got an average muzzle velocity of 912.7 and ended up with the far distance at 56 yards this time, and an average 56 yard speed of 784fps, working out to a BC of 0.0458, still promisingly high.
So, I averaged out the two for a BC of 0.04765 (0.048-just about what JSB reports) and plugged that into Strelok and plugged the clicks into the scope, and stretched it out a bit.
These were at 90 yards, 5 shots per paddle, no sighters, just Strelok data and 15 shots in a row. Shooting from a folding plastic table, with my knee riser acting kind of like a monopod (not very stable) and no rear rest (non trigger hand under the rear of gun).
I'm pretty excited for the .20 Heavies to be my budget long ranger now. I enjoy stretching out the .22 Monster RDs, but they're not quite as cheap as the .20 Heavies (and tough to get lately).
Takeaways.....
I've always read about people reporting better accuracy/bc/etc from pellets at an optimal speed from a specific barrel/gun, but had yet to see it so drastically as this evening. Nor had I ever had the desire to sit down and do comparisons. The 0.039 BC at around 26fpe is pretty ho-hum, but the 0.047 BC at around 29fpe is something to get excited about. So, if really hunting a high BC, shooting at various speeds to determine what fps gives the best comprise of BC, FPE, accuracy, and efficiency is well worth the time and effort.
There's still a little magic in the ole worn out, yesteryear's Silver Streak fodder, "on-the-way-out" .20 caliber. I'm glad I bought a bunch of the Heavies!
(yeah that's rising flood water in the back of the photo with the paddles, had and still having (at 130am) some drama around here this evening with concerns of it flooding out the newly renovated house, and actually flooding out some of my neighbors)
As a semi-related aside, I also collected some BCs from the 13.73gr .20s at my field target legal muzzle velocity average of 795 and 54 yard average of 670 for a BC of 0.039, pretty dang high for a field target legal configuration (although shouldnt come as a surprise since JSB reports 0.04 in their table).
Also generally interesting to look at the speeds JSB reported for each pellet in their BC testing. Makes a guy wonder how they arrived at those speeds. In my particular case, I was shooting the Heavies 25-30fps faster than they did.
Another one to note, LOTS of 270-290m/s listed on there.
Fun stuff.
