Hw77 shooting JSB Jumbo’s

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Yesterday on another thread JohnnyPiston asked if I had shot JSB’s out of my Hw77. I recall I had a tin of Heavies in my safe but they were Jumbo’s in the 15 gr range. What happened next was interesting. First thing I noticed was that the JSBS were very easy to place in the breach. Thinking the JSB’s were heavier I aimed the first shot at the top right hand bull, sailed straight over. The scope wasn’t touched from yesterday it was zeroed at 30 metres for the 12.5 Greens.

The first seven shots went high and all over the place (B) The next 10 shots grouped. So I thought I’d try another bull ( B) after 7 shots I couldn’t get the same group and it was getting hot. I was sweating like a long tailed cat in a room full of old people in rocking chairs so I called it beer o’clock time and went inside.

The conditions were the same as yesterday shooting the Greens, distance was the same also 36 metres. It looks like they will group but it think I’ll stick to the greens.

Gary





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Shooting H&N Barracuda Greens 12.65 gr 22 cal @ 36 metres slight breeze, 15 shots, 2 flyers excluding the flyers 20 mil horizontally and 15 mil vertically. Useing The artillery hold resting the back of my hand on the bag.


















 
Yesterday I shot some of the Exact Jumbo’s through my HW50S. This rifle is shooting the H&N FTT 9.65 Greens very well. I figured that if my Hw77 is shooting the heavier Jumbo’s approximately 3 inches higher then the 12.56 Greens I use in it then the same should apply to my HW50S.

Nope 4 inches low and were not grouping at 30 metres, the usual distance I zero my air rifles after 20 shots. So that’s two Of my rifles (HW’s) that these pellets don’t perform in. Now I know why the tin was in the back of the safe.😁

Gary