A while ago, I did put a .25 pellet in it to check things out. I think it fit but was stuck a bit. I was tentative because I didn’t to gaff anything up trying to dislodge the pellet if it went deeper. Thanks. S7
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What size is this Donny FL?
- Thread starter Sanctify7
- Start date
Given these measurements and crunching the numbers suggests the unmarked Sumo is probably a .22 caliber or an extremely tight .25. If I were you, I'd call it a .177/.22 and treat it like that. I just put four Ember's together with 1.5mm clearance over the caliber (which is about what it looks like DFL is using on those other three) and one of them clipped because I was testing them on a shrouded gun.
Call it a .22.
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How could a .25 pellet stick a bit in a .30 hole? I realize that it is probably on the tight side to prevent clipping if shot, but for just trying to fit a pellet through? Something seems off . . . .
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The tube they come in, no markings on the dfl shogun (inside or outside the moderator ).
John
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Far as I know, the newer DonnyFLs have the caliber size etched onto the monocore just underneath the thread adapter end. So you need to unscrew it to see. The older ones that I have don't have this marking. Not sure when he started adding that. Probably in the last couple years or so.
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I figured you meant the Donny tube. This particular moderator came from the seller without a tube. Actually, it came in a Shogun tube.
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Understood. I didn’t want to play around with things, as I said. But memory says the pellet took a bit to come out. I never messed with things again. I may revisit this tomorrow to try to square the matter.
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It may be an older model. I remember reading somewhere that Donny FL used to make them with a tighter (smaller hole) but later started making them a bit larger hole because there were many clipping issues. Just my opinion.
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In a perfect world, the imaginary axis through the rifles bore and the imaginary axis of the moderator would share the same axis (coaxiality). A couple scenarios that can exist individually or combined could cause the pellet to “clip” the moderator when passing through it.
With modern manufacturing methods these mismatching scenarios should not occur but sadly it can happen when someone isn’t paying attention or the machine being used is in poor shape or the workholding method is poor or worn.
If the threads in the moderator or barrel are not concentric with the imaginary true axis of either component, the pellet will not be flying down the true center. If the threads on the barrel are not square to the component that’s threaded the pellet will be going through the moderator on an angle and possibly clip the insides at some point or as it exits the moderator.
One or two of those anomalies could exist on just the barrel threads or just the moderator or on both items.
In addition to the above issues there is also the possibility of the threads being undersize and oversize on one or both items to add to the other possible manufacturing errors.
I have owned several Donny FL moderators and one or two other brands that were in similar price range to Donny FL’s and was very pleased with the quality of machining and never had experienced any clipping or other problems.
A local gunsmith did a barrel threading job on my Tikka PB for my suppressor (a PB rated suppressor, tax stamp and everything suppressor) and he wanted the suppressor so that he could use my suppressor as a gauge to make sure of a perfect fit. The down side of his method is if I got a different suppressor and its threads were a bit smaller, even by a half thousandth (.0005”) it would not fit without some reworking.
It is difficult to check alignment of a moderator axis to bore axis to ensure or verify coaxiality. It does not have to be perfect but perfect is nice.
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Thanks for the input. S
I likely will do this. I’ll get it from the horse’s mouth. Thanks. S7
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A very nice feature of this Forum is that problems or uncertainties often become tutorials, whether they are directly relevant to the issue at hand or solve the problem. Since I posted this thread a few days ago, I learned in a very short time nuances and particulars about moderators, etc. that eluded me for years. Thanks! S7
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Greetings.
I listed this in Classifieds, sold it, and it is marked as such.
Thanks, and I hope you find something.
S7
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My Shogun and Sumo (.25/.30) have openings of 0.36 and 0.35, respectively. Both. do a great job on either a .25 or .30 rifle.
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