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What size is this Donny FL?

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Sanctify7

Sanctify7

Member
Jul 2, 2022
644
177
Atkinson, NH
Greetings.

About six months ago or so, I purchased a Donny FL Sumo from a member. The listing said the moderator was .25 - .30. The front hole seems way too small for that, and the suppressor is marked "Sumo," but inside the cap there is no caliber marking, unlike the others I own which all have this.

I asked the buyer, and he said he used it as a .25 for sure--but I have doubts, going by the hole sizes I have with clearly marked suppressors.

I have several Donny FL suppressors, and the hole where the pellet exits is smaller than my .22 - .25, let alone my .25 - .30.

I am including three pictures of three suppressors. From left to right are a .25 - .30 Shogun, a .22 - .25 Sumo, and the Sumo under question. To my eye this Sumo on the right is either a .22, a .177 - .22, or a .177 - .22. But those are guesses.

I don't want to learn anything the hard way here.

Can anyone weigh in?

Thank you. S7

IMG_1965.jpg
 
Sanctify7 said:
Greetings.

About six months ago or so, I purchased a Donny FL Sumo from a member. The listing said the moderator was .25 - .30. The front hole seems way too small for that, and the suppressor is marked "Sumo," but inside the cap there is no caliber marking, unlike the others I own which all have this.

I asked the buyer, and he said he used it as a .25 for sure--but I have doubts, going by the hole sizes I have with clearly marked suppressors.

I have several Donny FL suppressors, and the hole where the pellet exits is smaller than my .22 - .25, let alone my .25 - .30.

I am including three pictures of three suppressors. From left to right are a .25 - .30 Shogun, a .22 - .25 Sumo, and the Sumo under question. To my eye this Sumo on the right is either a .22, a .177 - .22, or a .177 - .22. But those are guesses.

I don't want to learn anything the hard way here.

Can anyone weigh in?

Thank you. S7

View attachment 435150
Click to expand...
Do you have a pair of calipers?
Measure it and it would answer your question.
 
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Okay. Due to the brilliant common sense advice I received, here are some results of the dimensions of four Donny suppressors:
  • Shogun .25 - .30 = .36 inches
  • Sumo .22 - .25 = .32 (or 33) inches; I guess my hold with the calipers is not quite consistent
  • Sumo unmarked (the smaller hole) = .30 (or 31) inches (the same)
  • Donny FL .25 - .30 = .35 inches.
I am guessing the unmarked Sumo is either a very tight .22 - .25, a .177 - .22, or a .22. It is hard to know definitively what it is.

I have included a better picture of the marked .22 - .25 Sumo and the unmarked Sumo (on the right). Now the width difference is more clearly seen.

Thanks again, MEC.

S7

IMG_1976.jpg
 
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Sanctify7 said:
Okay. Due to the brilliant common sense advice I received, here are some results of the dimensions of four Donny suppressors:
  • Shogun .25 - .30 = .36 inches
  • Sumo .22 - .25 = .32 (or 33) inches; I guess my hold with the calipers is not quite consistent
  • Sumo unmarked (the smaller hole) = .30 (or 31) inches (the same)
  • Donny FL .25 - .30 = .35 inches.
I am guessing the unmarked Sumo is either a very tight .22 - .25, a .177 - .22, or a .22. It is hard to know definitively what it is.

I have included a better picture of the marked .22 - .25 Sumo and the unmarked Sumo (on the right). Now the width difference is more clearly seen.

Thanks again, MEC.

S7

View attachment 435210
Click to expand...
The unmarked one also has a different thickness on the outer lip where the relief holes are.
 
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Dr. Kralenstein said:
The unmarked one also has a different thickness on the outer lip where the relief holes are.
Click to expand...
I just took them out and looked at them. I am not sure what you are referring to. They look pretty much the same off camera. Thanks. S7
LDP said:
If that was a mod I built I wouldnt call a hole .060 over bore diameter of .250 a tight fit .25. I regularly keep my holes within .025 to .030. If that mod was made square and the barrel that its going on has a square shoulder to bore there is no reason it cant be used on a
Click to expand...
 
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LDP said:
If that was a mod I built I wouldnt call a hole .060 over bore diameter of .250 a tight fit .25. I regularly keep my holes within .025 to .030. If that mod was made square and the barrel that its going on has a square shoulder to bore there is no reason it cant be used on a .25.
Click to expand...
Okay. I found the post here. As I said, I really don't know what is happening on a technical basis. But do tell, my reading of the calipers came to .30; how is that .060 over a .25 bore diameter. I am not challenging, just trying to figure out what you precisely mean. I get the .25 use is okay. Thanks. S7
 
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Sanctify7 said:
But do tell, my reading of the calipers came to .30
Click to expand...
I read your post wrong I thought you said you got .310. If you got .300 then its .050 over a 25 cal pellet. Still plenty of room. I added my comment about where I set my pass thru hole size to illustrate .050 over bore is plenty if the mod is built straight and the barrel has a square shoulder to the bore.
 
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Spartan said:
My unmarked Sumo's exit hole measures 0.312" and I use it with .25 cal. Hope that helps.
Click to expand...
Ah! I am reading your post after I read spysir's. Yes, this helps. Thanks.
As I said above, my calipers only round to one-hundredths, so I cannot get a more precise measurement to try to correspond to yours. I don't think (?) that this small number (0.312 vs. the rounded .31) will make much difference. And if I am incorrect, I am sure someone will let me know. :) S7
 
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For the record, I have items up for sale, and this moderator may join them. Please do not think I am trying to drop it on someone. If it is .25 caliber, I have a marked Sumo doing the same thing. (If someone said it was a .177 - .22, then I probably would have kept it.) I do not need two of the same suppressor at this time; in fact, I still have one or two extras. I will do a full disclosure if I sell, nevertheless.

Again, thanks for the help. The upshot of the advice here is that I do not need it. But one thing comes to mind that may say otherwise: Does a smaller fit for a suppressor aid accuracy? Or is the matter more complex?
Put differently, if I am shooting a .25 gun with a .25 - .30 moderator (which I am), would better accuracy ensue if I used a .22 - .25? S7
 
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LDP said:
I read your post wrong I thought you said you got .310. If you got .300 then its .050 over a 25 cal pellet. Still plenty of room. I added my comment about where I set my pass thru hole size to illustrate .050 over bore is plenty if the mod is built straight and the barrel has a square shoulder to the bore.
Click to expand...
Okay. Help me out here a bit further, please. I know something about calibers, but not the kinds of details you are involved with. I now get the math, but how is something like a .300 hole the right size for or .25 pellet? That's .050 over the pellet size, right? Unless the obvious is eluding me: the .050 is simply the amount of space needed to insure proper exiting of the pellet without contact? Did I answer my own question? Thanks.
 
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Sanctify7 said:
Okay. Help me out here a bit further, please. I know something about calibers, but not the kinds of details you are involved with. I now get the math, but how is something like a .300 hole the right size for or .25 pellet? That's .050 over the pellet size, right? Unless the obvious is eluding me: the .050 is simply the amount of space needed to insure proper exiting of the pellet without contact? Did I answer my own question? Thanks.
Click to expand...
Yes thats the basics of it. I build my mods to have .010 - .015 of clearance per side giving a total of .020 - .030 clearance. So my personal mods would measure .270 - .280 for a .25 cal. I can build them with tighter holes cause its a one off and I have the rifle in hand and know if the shoulder on the barrel is true enough to not clip pellets. If its not true I have the equipment to re machine the thread tenon and shoulder on the barrel to make it true. People who make mods for the masses have to give a little more room incase the rifle it goes on was not cut perfectly true.
 
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LDP said:
Yes thats the basics of it. I build my mods to have .010 - .015 of clearance per side giving a total of .020 - .030 clearance. So my personal mods would measure .270 - .280 for a .25 cal. I can build them with tighter holes cause its a one off and I have the rifle in hand and know if the shoulder on the barrel is true enough to not clip pellets. If its not true I have the equipment to re machine the thread tenon and shoulder on the barrel to make it true. People who make mods for the masses have to give a little more room incase the rifle it goes on was not cut perfectly true.
Click to expand...
That is a very helpful bit of information, LDP. It is all new stuff to me. Thanks. S7
 
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