Well they are a really bargain. having a but more power than the 1632 and almost the sme velocity they ar up todau mu favorite tubes. >The comfortable pull and the longevity of this tubes is outstanding. I usually shoot with sinlge or tapered tubes and i can only say that these tubes are fantastic for all tubes up to 8mm even singles. However I shoot mainly with 7mm. If looped or tapered they can withsrand with high velocity I think up to 9mm.
And im going to buy now again.