GTA

All Springer/NP/PCP Air Gun Discussion General => Air Gun Gate => Topic started by: mcc1961 on June 25, 2011, 01:26:19 AM

Title: duct seal
Post by: mcc1961 on June 25, 2011, 01:26:19 AM

How thick should the duct seal in a pellet trap be for a .22@800fps at 20 to 25 yards.

Title: Re: duct seal
Post by: kudzu on June 25, 2011, 06:31:17 AM

FWIW, Copied from Archer Airgun's website:

Recommended starting depths for Duct Seal in "Silent" Pellet Traps
For .177 wadcutters    Muzzle Velocity    Duct Seal Depth
                                    500fps                1 inch
                                    900fps                2 inches
                                   1200fps               4 inches
                                                            Add 50% to all depths for pointed pellets       
       
For .22 wadcutters    Muzzle Velocity    Duct Seal Depth
                                    500fps                1 inch
                                    700fps                2 inches
                                   1000 fps              4 inches
                                                            Add 50% to all depths for pointed pellets

Title: Re: duct seal
Post by: DMikeM on June 27, 2011, 07:27:24 PM

Wow that's a lot of duct seal. I have been using 1/2 inch in my metal trap and it stops everything fine. Even stopped a .22 Winchester Mag rimfire last weekend @ 66 yards made a big dent in the back but no penetration. My box is made of an electrical junction box (fuse box) 9x12" and I have 2 bricks of seal smashed to the back. Been shooting it for 2 years now.

Title: Re: duct seal
Post by: glassman98 on June 27, 2011, 08:32:36 PM

Quote from: mcc1961 on June 25, 2011, 01:26:19 AM

How thick should the duct seal in a pellet trap be for a .22@800fps at 20 to 25 yards.

2" should be enought for any AR.  gman

Title: Re: duct seal
Post by: S.S.Tupperware on June 28, 2011, 05:29:39 PM

Do ya mean the strips that seal metal duct flanges together? I used that for vacuum bagging some epoxy layups, and worked  great. i was a Superintendent so mine was free, but no more, thinkin of using modeling clay, probably lots cheaper...

Title: Re: duct seal
Post by: Flyer91 on June 28, 2011, 07:03:16 PM

I just bought 5 lbs of duct seal off eBay for a delivered price of $14.22.

I have a Do-All pellet trap that I am going to modify (more than I already have) so I can add the d/s to it, and stop the noise.

I've added a place to store my targets by adding a cover over the back of the traps slanted recess. It has a flip open lid so the targets that I print out off the internet are protected from the sun and to a lesser degree ...... poor weather/dew.