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Question about choke constriction

Started by span870, April 04, 2017, 08:16:26 PM

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span870

Just got a Remington super full choke and going to put it in either my 11-87 compact or 870 compact. Both have same length barrels. I'm used to using 12ga 3.5 and didn't worry too much about choke because the areas I hunt most shots are under 30 yards. My question is Remington states that the constriction is .665. I am going to be better off using a smaller shot such as 6's or 7's out of it, right? I see alot of guys using a more open choke in the 550's. Am I using too tight of choke? Haven't shot it yet, just wanted a base. From what I gather using larger shot requires a more open choke. Am I wrong here or just confused?

Spring Fever

Your confused
650 is tighter than 665
You will be fine with that choke for whatever shot size you decide
Mine loves the winlongbeard#6's

span870

Quote from: Spring Fever on April 04, 2017, 08:28:29 PM
Your confused
650 is tighter than 665
You will be fine with that choke for whatever shot size you decide
Mine loves the winlongbeard#6's

Thanks. That's what was confusing me. Thinking the higher numbers was a tighter choke for some reason.

Spring Fever

Good deal
We have all been there.
That's a good choke

BandedSpur

Yes, you are confusing exit diameter with choke constriction. For a bore that measures .730", a choke with an exit diameter of .665" has a constriction of .065" (.730-.665=.065). A choke with an exit diameter of .650" has a constriction of .080" (.730-.650=.080). So a .650 is tighter than a .665. These numbers are for a 12 ga, but the same principle holds true for all gauges.

span870

#5
So help me out here. When I ordered it, it stated .660 constriction. I get it today it says .045 constriction .572 inside. So is it .572? Am I still looking in the area of 6's or hvywt7's? or hevi 7's or am I better off larger shot. Man this stuff was so much easier with a 12 3.5 incher.

BandedSpur

Either you or Rem are confused. No choke tube is going to have .660 constriction. A 12 ga tube could have a .660 exit diameter (.069 constriction). But your 20 ga will have a bore around .615. A tube with .045 constriction will end up with an exit diameter around .570, and should be fine for your HW 7s or HS 7s. I would not use larger shot than that in your 20 in an HTL product. If you choose to shoot lead, I would look at the LB 6s.

span870

Quote from: BandedSpur on April 07, 2017, 09:09:09 AM
Either you or Rem are confused. No choke tube is going to have .660 constriction. A 12 ga tube could have a .660 exit diameter (.069 constriction). But your 20 ga will have a bore around .615. A tube with .045 constriction will end up with an exit diameter around .570, and should be fine for your HW 7s or HS 7s. I would not use larger shot than that in your 20 in an HTL product. If you choose to shoot lead, I would look at the LB 6s.

I'm definitely confused but ordered it from cheaper than dirt because only place I could find it. On their sight it stated .660. When I got it and opened it, it stated other size. This is definitely a learning curve and I thank you guys for the help. Going to try several different shells out this weekend and see what we get.

Spring Fever

I assume from your earlier post this is for a R.E.M. 20 gauge?
If so your chokes will be in the .550 (very tight)-.585 (more open)mark

If not and it is a R.E.M. 12 gauge they will be in the
.650(very tight)- 695(more open)

I shoot both of them and can tell you what works for me but all guns are different.
If it's easier shoot me a pm and I'll send you my number or give me yours and we can talk on the phone if that's easier. No worries
Thanks
Greg