In this Field Test Shooting Review I test out the Umarex S&W M29 8 Inch Barrel Shell Loading CO2 BB Revolver in the Replica Airguns Sea Can Indoor Shooting Range to find out its velocity and accuracy using both 4.5mm Steel BB’s and .177 Caliber Lead Pellets. The version I am using is the BB version but my viewers have informed me that the BB version may in fact shoot just as well as the pellet version using pellets even without the rifled barrel due to how pellets are shaped not always requiring a rifled barrel to fly true. So let’s find out!
Starting with the velocity test, I shot 4 rounds of each ammo through my Chronograph using a fresh CO2 cartridge. Umarex claims the Umarex S&W M29 8 Inch Barrel Shell Loading CO2 BB Revolver is able to get a maximum fps of 420 using standard 4.5mm steel BB’s and I was able to average 396 so every close. In warmer conditions 420 fps should be possible. Switching to the .177 caliber lead pellets the fps lowered a bit to an average of 323 fps as expected since the pellets are much heavier (around 7 grain versus 5 grain). I would expect the energy of the pellets to be a bit higher and also keep that energy out to further ranges so if you plan to shoot longer ranges perhaps go with the lead pellets over the BB’s as long as they are similar in accuracy which I test next.
For the accuracy portion of the test I again started off with the 4.5mm Steel BB’s and fired 6 rounds into my paper target setup 30 feet down range. I shot the Umarex S&W M29 8 Inch Barrel Shell Loading CO2 BB Revolver using a seated shooting position with my hands resting up front on a sand bag to help with stability but it’s not perfect and there is always some human factor to consider. That said I was able to shoot a 1.5 inch 6 shot grouping with the BB’s and if I remove one outlier from the group that reduced it to closer to around an inch so not too bad for a BB shooter. I then switching up to the .177 caliber lead pellets and was a bit surprised that even without a rifled barrel the pellets seemed to perform better than the Steel BB’s getting a solid 1 inch grouping with no real outliers in it!
Unfortunately I do not have the actual rifled barrel version of the Umarex S&W M29 8 Inch Barrel Shell Loading CO2 Revolver. Perhaps in the future I can compare the BB verso to the Pellet version using pellets to see if there is an improvement with the addition of the rifled barrel. I can say the BB version without the rifled version shoots pellets just fine at least up to 30 feet so feel free to shoot whatever ammo you want to with it and not be worried about compromising accuracy or velocity.