So I was shooting my BSA/Gamo 177 Dynamax PCP

So I was shooting my BSA/Gamo 177 Dynamax PCP

Joined: May 12th, 2011, 3:44 am

June 24th, 2011, 5:13 am #1

I read the old article from Tom Gaylord reviewing this rifle in the same caliber before I conducted my own test. My rifle is different than his. He was getting 30 shots before dropping off. I discovered when shooting from a 232 bar fill, that the velocity was much lower than expected. I think this is due to valve lock up. My test pellet was the CP mags at 10.5 grains. The first shot was 820 feet per second. By Shot 15, the FPS steadily climbed to 900 FPS and at its peak would reach 980 FPS. When I finally hit the power curve, I was getting very consistent 950 fps shots plus or minus a fps for 20 shots. This is what I found out about this gun of mine. It performs better at a 200 bar fill than the max 232 fill. At a max fill, I was getting 65 good shots that did not dip under 800 fps. From a 200 bar fill, I was getting 50 good shots that did not go below 800 fps. I hit the power curve much sooner from a 200 bar fill. I shot all the way down to about 1500 PSI before recharging (I used my hill pump to gauge how much air was left in the rifle). I am amazed how many shots I am getting from this air rifle! The tank is not that big either. Very easy air rifle to pump up and nails the 10 ring every time! This BSA in disguise is an absolute bargain! The down side is how much the mags cost and the availability. I'm going to have to suck it up and buy at least one. The one I have is clearly not enough!

Recap
-The Dynamax is a solid PCP
-The Brits know how to build an air rifle
-Shooting stuff is fun!
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Joined: July 6th, 2009, 8:48 pm

June 24th, 2011, 1:22 pm #2

I took mine apart cuz it wouldn't rotate I found a bunch of gunk inside it didn't look like grease it was filthy though not much to it I can't see why they want so much for them.
Last edited by voodoopig on June 24th, 2011, 1:46 pm, edited 1 time in total.
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Joined: May 12th, 2011, 3:44 am

June 24th, 2011, 5:12 pm #3

I have had no issue with the mag now that I understand how it works. I spoke to a Gamo rep and he said BSA has tried to make them cheaper but they did not work and that BSA does not make much on the mags. I still think they can be made cheaper, especially with modern CNC equipment that can pump them out quickly. The mags are the greatest down fall of the BSA line. I can't seem them being worth more than $30. (Cost a lot more than my center fire and rim fire mags.) I think the FX design that the Marauder uses is a better design. Never an issue with them and cost effective.
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Joined: July 6th, 2009, 8:48 pm

June 24th, 2011, 6:09 pm #4

yeah your right there isn't much to them, there's some real talent in the airgunning community hopefully someone will come up with a better cheaper mag.
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