I gained 5 yards per choke construction that I went down, using fc and an m4.
I gained 5 yards per choke construction that I went down, using fc and an m4.
Just adding a data point - 21” 870, IC Remchoke, 10 yards. FC #1 on the left, old school H132 OO on the right. I wish the FC were a little tighter, bit I’ll try a Cylinder choke to see if that makes a difference. Note the wad impacts - FC punching through, traditional bounces off.
The cylinder choke most definitely will make a difference. At 10 yards and under my 590A1 is about the same as shooting slugs with FC. At 25 yards I can keep ALL pellets in the upper A-B zone on a USPSA target. It's mind blowing to me since I started my shooting life with shotguns on dove.
Last edited by Spartan1980; 04-08-2018 at 04:48 PM.
So I ordered a cylinder choke to try, and some 8 and 9 pellet OO Flite control. The weather is pretty lousy so I just tried the OO at 10 yards, same IC choke. When I can get to the the range for more testing I’ll try the CYL choke.
So I received the new Trulock CYL choke for my Benelli M4. Shot more Hornady TAP 00 Light Magnum, and while I totally spaced taking pics due to time constraints, it averaged 7-8" spread at 25 yards, which is definitely better than I was getting with the factory MOD choke. I'll be shooting it again soon, so I'll try to remember to grab some pics at 10-15-25y.
Side note: I saw a POA/POI change from my original 25y zero using Honady TAP LM slugs through the MOD choke. The new CYL choke shot 3" high, so I made the appropriate corrections as I plan to stay with the CYL.
Finally tried the cylinder choke in the 21” barrel. Definitely tightened up the patterns. It looks like the 8 pellet is still in the wad at 10yards and the 9 and #1 are just released.
Out at 35 yards the results are interesting. 3 rounds of 8 pellet vs 3 rounds of #1. The 8 pellet seems to be 21/24 and the #1 I count 42/45 on the 24” square. The #1 hits above poa with the 8 pellet grouping around it. Have to give some thought to ammo selection after more testing.
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25 yards, confirmed zero of rifle sights on my 18.5" cylinder bore 870 barrel with Truball Deep Penetrator load.
Then checked POI of FFC #1 buck. POA was center of 4x6 card Attachment 32715
Last edited by JHC; 11-25-2018 at 02:09 PM.
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