Nic_USPSA_C Posted May 27, 2019 Share Posted May 27, 2019 Who has done this themselves? Tips, advice, instructions. I have a mill that I can use to do the job, dimensions would be great. Link to comment Share on other sites More sharing options...
aandabooks Posted May 27, 2019 Share Posted May 27, 2019 I did mine in two of my guns and a couple for a friend with a 5/32" solid carbide 4 flute endmill. I spaced the holes 3/8" for a total of 3/4". I put them all in straight up. Doing it again I would angle the first one forward 10 degrees. It would help keep the glass cleaner. Link to comment Share on other sites More sharing options...
zzt Posted May 27, 2019 Share Posted May 27, 2019 I prefer two 3/16" poppels with 3/16" between them. Use carbide endmills, preferably ball end, and go slow when you break through. Shoot jacketed after that to remove any burrs. Link to comment Share on other sites More sharing options...
Nic_USPSA_C Posted May 27, 2019 Author Share Posted May 27, 2019 Thanks - did they help with dot movement? Link to comment Share on other sites More sharing options...
aandabooks Posted May 27, 2019 Share Posted May 27, 2019 31 minutes ago, Nic_USPSA_C said: Thanks - did they help with dot movement? Yes. They help or people wouldn't do it. They do come with the cost of a little more gas on the glass and you'll have to up you powder a couple .1s to make the same power factor. I'm not yet sure that I will be adding any holes to my new Czechmate. I don't have enough time on the gun to determine if I will need them. Link to comment Share on other sites More sharing options...
Flatland Shooter Posted May 27, 2019 Share Posted May 27, 2019 9 minutes ago, aandabooks said: They help or people wouldn't do it. Ususally correct. Brian Miller milled a few holes in one of his 16" PCC barrels. Early results sounded promising. I guess I need to contact him to ask a few questions and see if he still likes them. I don't know if he is the only one to try it but I'd bet he was the first. Link to comment Share on other sites More sharing options...
aandabooks Posted May 27, 2019 Share Posted May 27, 2019 22 minutes ago, Flatland Shooter said: Ususally correct. Brian Miller milled a few holes in one of his 16" PCC barrels. Early results sounded promising. I guess I need to contact him to ask a few questions and see if he still likes them. I don't know if he is the only one to try it but I'd bet he was the first. I have been referring to pistols with poppel holes. I have no experience trying poppel holes in a PCC. My PCC runs a Taccom barrel that is basically an aluminum tube for 11" so I can't imagine it would help with my build. Link to comment Share on other sites More sharing options...
Nic_USPSA_C Posted May 27, 2019 Author Share Posted May 27, 2019 I do not reload - So I purchase my ammo from Everglades. Here are my results in the picture. If I add two poppel holes will I still make major PF? How much of a reduction in FPS would you estimate? Link to comment Share on other sites More sharing options...
zzt Posted May 27, 2019 Share Posted May 27, 2019 Nic, it all depends on your barrel. I have a pair of Open guns that are essentially the same except the main gun has two 3/16" poppels. Comps are the same. I lose 3PF for a major load in the poppeled gun, with an identical load. If your SDs are single digit, you should be fine with adding poppels. Bear in mind, the farther back you place the poppels, the more gas they rob, so velocity is lower. Link to comment Share on other sites More sharing options...
NoSteel Posted May 28, 2019 Share Posted May 28, 2019 As stated by others using a ball mill gives a better more precise cut. I angled my hole closest the glass 10 degrees forward, It helps keep the gas from both away from the sight.. Link to comment Share on other sites More sharing options...
Nic_USPSA_C Posted May 28, 2019 Author Share Posted May 28, 2019 Are you happy with the results? Would you do it again? When you Milled your slide, how close to the end of the slide did you go? Link to comment Share on other sites More sharing options...
Nic_USPSA_C Posted May 28, 2019 Author Share Posted May 28, 2019 This is my project gun. Also looking into slide lightening as this gun as none. Link to comment Share on other sites More sharing options...
NoSteel Posted May 29, 2019 Share Posted May 29, 2019 It definatly helped in keeping the dot in the glass. I went with just 2 holes.. Link to comment Share on other sites More sharing options...
Nic_USPSA_C Posted May 29, 2019 Author Share Posted May 29, 2019 10 hours ago, NoSteel said: It definatly helped in keeping the dot in the glass. I went with just 2 holes.. Share some dimensions? Hole Size, Slot Size, distance from comp? What kind of fps loss did you get after adding them? Interested in any info you can share. Link to comment Share on other sites More sharing options...
Trentmopar Posted October 24, 2019 Share Posted October 24, 2019 Good thread guys thanks for the info! Link to comment Share on other sites More sharing options...
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