Quote from: nervoustrigger on February 07, 2023, 12:49:42 AMFYI finding the velocity knee pertains to regulated PCPs. The Beeman 2027 is unregulated. If it will accept a bstaley O-ring buffer, that's a proven way to produce broad shot strings at modest velocities. Thanks for the suggestion.I had not considered that but it makes sense.Do you think the valve should get more preload or a stiffer spring?I googled "BStaley o ring"I did this to a Chaser and it is so much better.
FYI finding the velocity knee pertains to regulated PCPs. The Beeman 2027 is unregulated. If it will accept a bstaley O-ring buffer, that's a proven way to produce broad shot strings at modest velocities.
Quote from: James340 on February 07, 2023, 01:03:32 PMQuote from: nervoustrigger on February 07, 2023, 12:49:42 AMFYI finding the velocity knee pertains to regulated PCPs. The Beeman 2027 is unregulated. If it will accept a bstaley O-ring buffer, that's a proven way to produce broad shot strings at modest velocities. Thanks for the suggestion.I had not considered that but it makes sense.Do you think the valve should get more preload or a stiffer spring?I googled "BStaley o ring"I did this to a Chaser and it is so much better.The BStaley o-ring mod has the same effect as increasing the return valve spring tension and buffering the hammer bounce from re-opening the valve. It kills two birds with one stone. However, not all hammer-valve designs can use the BStaley o-ring mod.
Quote from: sactargetshooter on February 07, 2023, 01:38:34 PMQuote from: James340 on February 07, 2023, 01:03:32 PMQuote from: nervoustrigger on February 07, 2023, 12:49:42 AMFYI finding the velocity knee pertains to regulated PCPs. The Beeman 2027 is unregulated. If it will accept a bstaley O-ring buffer, that's a proven way to produce broad shot strings at modest velocities. Thanks for the suggestion.I had not considered that but it makes sense.Do you think the valve should get more preload or a stiffer spring?I googled "BStaley o ring"I did this to a Chaser and it is so much better.The BStaley o-ring mod has the same effect as increasing the return valve spring tension and buffering the hammer bounce from re-opening the valve. It kills two birds with one stone. However, not all hammer-valve designs can use the BStaley o-ring mod. I think I will try it.I found a good combination for 12 shots at 600 fps but I would like more shots
Quote from: James340 on February 07, 2023, 02:38:30 PMQuote from: sactargetshooter on February 07, 2023, 01:38:34 PMQuote from: James340 on February 07, 2023, 01:03:32 PMQuote from: nervoustrigger on February 07, 2023, 12:49:42 AMFYI finding the velocity knee pertains to regulated PCPs. The Beeman 2027 is unregulated. If it will accept a bstaley O-ring buffer, that's a proven way to produce broad shot strings at modest velocities. Thanks for the suggestion.I had not considered that but it makes sense.Do you think the valve should get more preload or a stiffer spring?I googled "BStaley o ring"I did this to a Chaser and it is so much better.The BStaley o-ring mod has the same effect as increasing the return valve spring tension and buffering the hammer bounce from re-opening the valve. It kills two birds with one stone. However, not all hammer-valve designs can use the BStaley o-ring mod. I think I will try it.I found a good combination for 12 shots at 600 fps but I would like more shotsGood luck James! Please post your results on how the mod performed in your 2027.
Quote from: stroo on February 07, 2023, 08:50:13 PMQuote from: James340 on February 07, 2023, 02:38:30 PMQuote from: sactargetshooter on February 07, 2023, 01:38:34 PMQuote from: James340 on February 07, 2023, 01:03:32 PMQuote from: nervoustrigger on February 07, 2023, 12:49:42 AMFYI finding the velocity knee pertains to regulated PCPs. The Beeman 2027 is unregulated. If it will accept a bstaley O-ring buffer, that's a proven way to produce broad shot strings at modest velocities. Thanks for the suggestion.I had not considered that but it makes sense.Do you think the valve should get more preload or a stiffer spring?I googled "BStaley o ring"I did this to a Chaser and it is so much better.The BStaley o-ring mod has the same effect as increasing the return valve spring tension and buffering the hammer bounce from re-opening the valve. It kills two birds with one stone. However, not all hammer-valve designs can use the BStaley o-ring mod. I think I will try it.I found a good combination for 12 shots at 600 fps but I would like more shotsGood luck James! Please post your results on how the mod performed in your 2027. I installed a 3x13 mm o ring in a Chaser and my shot count went from 40 to 85.425 fps for first shot 488 for the 81 shot.that is at 65 degrees might be better when it warms up.
Quote from: James340 on February 07, 2023, 08:57:53 PMQuote from: stroo on February 07, 2023, 08:50:13 PMQuote from: James340 on February 07, 2023, 02:38:30 PMQuote from: sactargetshooter on February 07, 2023, 01:38:34 PMQuote from: James340 on February 07, 2023, 01:03:32 PMQuote from: nervoustrigger on February 07, 2023, 12:49:42 AMFYI finding the velocity knee pertains to regulated PCPs. The Beeman 2027 is unregulated. If it will accept a bstaley O-ring buffer, that's a proven way to produce broad shot strings at modest velocities. Thanks for the suggestion.I had not considered that but it makes sense.Do you think the valve should get more preload or a stiffer spring?I googled "BStaley o ring"I did this to a Chaser and it is so much better.The BStaley o-ring mod has the same effect as increasing the return valve spring tension and buffering the hammer bounce from re-opening the valve. It kills two birds with one stone. However, not all hammer-valve designs can use the BStaley o-ring mod. I think I will try it.I found a good combination for 12 shots at 600 fps but I would like more shotsGood luck James! Please post your results on how the mod performed in your 2027. I installed a 3x13 mm o ring in a Chaser and my shot count went from 40 to 85.425 fps for first shot 488 for the 81 shot.that is at 65 degrees might be better when it warms up.I didn't realize the hammer drove the poppet that far! I've never seen the guts of a Chaser but assuming it's like a Crosman that's driving the stem flush (or more with momentum) for a 3mm o-ring to make that drastic of a difference. My thoughts were the valve only opened a few mm before pressure and valve spring forced it closed again. Love this place, learn something every time I'm here!