I am curious if any of you can tell me the effect of rotating my Crown MKll 500mm barrel 180 degrees off the small port to the larger port. I am wondering what the change would be in FPS and or accuracy. I assume someone has tried it?
FX Rotating Crown MKll barrel
- Thread starter PennyPincher
- Start date
this thread explains it a little.
www.airgunnation.com
FX barrel Slug vs Pellet port (air efficiency)
Hello- can anyone explain to me why use S vs P port on the FX barrel is more air efficient than the other or they use the same amount of air? if the reg is the same P port give you 900fps, and S port give 950fps. Why bother using P port? and let’s say of we want to shoot lighter pellets...
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Hi,
Just my 2 cents. The pellet vs slug port is very important in rifles like the M3/4's, Maverick,s, and Panthera/Dynamic's. Not so much on the Crowns. The reason is on the Crown's you have a transfer port wheel which allows you to choose one of three transfer port sizes. This adjustment is before the barrel in the air flow path. If you use a small opening here using the pellet port on the barrel is somewhat redundant and could cause addition disturbance to the already decreased air flow.
I just keep the barrel on the slug side to reduce the flow disturbance as the air bends 90 degrees in the barrel. Even when shooting .177 pellets I use the slug port on the barrel and I have had really good success in Field Target doing this. I use the Medium Transfer Port setting as I find it gives good airflow and seems to improve my accuracy over the High flow setting.
Cheers,
Greg
Just my 2 cents. The pellet vs slug port is very important in rifles like the M3/4's, Maverick,s, and Panthera/Dynamic's. Not so much on the Crowns. The reason is on the Crown's you have a transfer port wheel which allows you to choose one of three transfer port sizes. This adjustment is before the barrel in the air flow path. If you use a small opening here using the pellet port on the barrel is somewhat redundant and could cause addition disturbance to the already decreased air flow.
I just keep the barrel on the slug side to reduce the flow disturbance as the air bends 90 degrees in the barrel. Even when shooting .177 pellets I use the slug port on the barrel and I have had really good success in Field Target doing this. I use the Medium Transfer Port setting as I find it gives good airflow and seems to improve my accuracy over the High flow setting.
Cheers,
Greg
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Interesting Greg…
I’ve never tried the slug port in my Dreamlines/Crowns
I thought the look of the slug port might be more damaging to a pellet skirt as it travels across it during loading.
Since you have had good results, I might give it a try.
-Ed
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I set all my FX barrels on slug port. The only exception being if its gonna be set up as a low power rifle in the 12 fpe range. I have never had any issues with damaged pellets or mis feed from using the slug port.
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