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Air Gun Home Forum Index » Airgun Smithing » airgun crown questions    View previous topic :: View next topic  airgun crown questions   Posted: Mon Apr 30, 2012 1:36 pm cyberfish2 Member Joined: 18 Apr 2010 Posts: 33 Location: N. Calif. Ok, here's what happens when you are retired and have too much time on your hands. I read the blog on PA about inserting pellets. Using the tip of a ball point pen, getting the pellets flush with the bore. I had a close look at my three airguns: the G. Whisper has a substantial chamber( I refer to the slight taper where the pellet skirt sits flush with the end of the barrel.) The C. Titan looks to have zero chamber. The Beeman RS2 has a tiny, but somewhat irregular, chamber on both the .22 & .177 barrels. I'm getting picky here. Generally speaking, some pellets stick out, some will slide down into the barrel when seated with the tip of a ball point pen. Some seat flush, just using my thumb. I understand about the differences in pellet geometry affecting fit, and accuracy. If I rework the chamber, shouldn't it be lapped at an angle to match the back of the pellet skirt? And only enough to get the pellet to fit flush, using my thumb? The Gamo shoots well with what I think is already too much chamber depth, so I will leave it alone. The Beeman just needs a cleanup(?). What do I do with the C. Titan? It seems to need some chamber, as there is not much group consistency, and I know the pellets shouldn't protrude. I know the answers are out there, so thanks in advance. Last edited by cyberfish2 on Mon Apr 30, 2012 5:18 pm; edited 2 times in total _________________ Tech Force Contender 87 .22 Gamo Whisper w/diy GP .22 Crosman Titan GP .22/.177 Beeman RS2 .177 Daisy 880 Several pistols and antique airguns.   Posted: Mon Apr 30, 2012 3:22 pm rsterne Moderator Joined: 15 Jan 2008 Posts: 2998 Location: Coalmont, BC It's called the "leade" or chamber.... the "crown" is at the muzzle end.... If you seat pellets BELOW flush you will likely find you lose velocity.... Having them sit flush is the ideal situation.... As long as they are not being crushed when you close the breech, they are probably OK.... Bob _________________ Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since! Airsonal: Too many to count!   Posted: Mon Apr 30, 2012 5:16 pm cyberfish2 Member Joined: 18 Apr 2010 Posts: 33 Location: N. Calif. rsterne wrote: It's called the "leade" or chamber.... the "crown" is at the muzzle end.... If you seat pellets BELOW flush you will likely find you lose velocity.... Having them sit flush is the ideal situation.... As long as they are not being crushed when you close the breech, they are probably OK.... Bob Thanks, I edited the post to "chamber". From what I read, the skirt size is just barely larger than the pellet head on most good quality ammo. Maybe the best solution would be to stop using the ones that stick out, or don't seat evenly with the rear chamber face? _________________ Tech Force Contender 87 .22 Gamo Whisper w/diy GP .22 Crosman Titan GP .22/.177 Beeman RS2 .177 Daisy 880 Several pistols and antique airguns.   Posted: Mon Apr 30, 2012 7:32 pm rsterne Moderator Joined: 15 Jan 2008 Posts: 2998 Location: Coalmont, BC The solution is to use the ammo that is the most accurate in your gun.... If you can't get it to shoot well with ANY pellets, then have a look at altering the leade into the chamber.... Bob _________________ Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since! Airsonal: Too many to count!   Posted: Mon Apr 30, 2012 8:28 pm Slavia Moderator Joined: 31 Mar 2008 Posts: 4382 Location: Waseca, Minnesota, USA I use seating tools in some situations. It makes a big difference when I shoot Meisterkugeln's in my Slavia 631 (faster and more accurate), or Ultramags in my G1 (same speed but more accurate). In other cases there isn't enough improvement to warrant the fuss. You just have to experiment. My seating tools have a domed end for trueing and flaring the skirt. Seating them slightly past the leade chamfer swages them down to uniform size. I read somewhere that you shouldn't seat pellets more than 0.050" past flush, so my seating tools are adjustable. The right angle tool is for my Marksman 2004 and Industry B3-2. Some more information: http://www.pyramydair.com/article/How_to_load_pellets_in_airguns_Part_1_spring_piston_guns_November_2010/80 _________________ ¡Listo! ¡Apunte! ¡Fuego! airgun crown questions     Air Gun Home Forum Index » Airgun Smithing You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum All times are GMT - 5 Hours   Page 1 of 1   All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First  Select a forum Main Forums----------------AirGunHome Q&AGeneral Air Gun Questions and TopicsPicture GalleryTarget Shooting: Casual, Fun and CompetitionHunting, Pest Control, Varminting People/Events/Airgun Issue Discussion----------------Introduce YourselfThe BS TopicClubs/Events/Regional/Political Airgun Issues Maintenance, Modification and Reviews----------------RiflesPistolsAntique, Collector and Novelty AirgunsBB GunsPellets/AmmoOpticsAccessoriesAirgun Smithing Buy, Sell or Trade Forums----------------For SaleWant to Buy   Note: If you are seeing "Please enter your username and password to log in." 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