Quote from: nced on February 13, 2016, 03:43:47 PMQuote from: Underdog on February 08, 2016, 05:09:42 PMWhen I first got into airguns, one of the first things I read was over on CharlieDaTuna's website about using pellets no larger than about 8 grains because it can damage your spring.Is this true? I've just ordered a HW95 from AoA, with a box of 10.65 grain Baracuda Match H&N pellets. Maybe I should have stayed below 8 grains?What do you think?Kinda late to this party but I have some first hand info concerning CP heavies (10.5 grain) in an R9. When I first introduced my brother to airguns decades ago by selling him one of my home tunes .177 R9s he shot only CP heavies since they were very accurate and they would drive 3/4 way through a grey squirrel LONG WAYS after busting some larger bones. Because of this he had the skill to angle a CP heavy through the vitals of a squirrel from any angle! LOL....when cleaning squirrels with my brother there was one grey squirrel that was hit at the right hip and the CP heavy drove longways through and we found the mangled pellet lodged in the spine at the neck. Here are two 50 yard 3 shot groups (was shooting typical powder burner groups) he shot "back to back" with the R9 I sold him and CP heavies.......Uploaded at Snapagogo.comShooting "heavies" I used to replace his good Maccari aftermarket spring about every two years shooting about a box of CPs a month. After shooting heavies for several years he found that the flatter trajectory of the 7.9 grain CP light trumped the slightly better wind resistance and deep driving CP heavy. After switching to CP lights I only replace one Maccari spring in several years and that spring spent half of it's "life" shooting CP heavies. After replacing that spring with a new Maccari Tarantula spring (my favorite variety no longer being sold) he never replaced it after several years of shooting when I moved to North Carolina. Anywhoo........I've never shot pellets heavier than 8.6 grains from my R9 and heavier than 8.4 grains with my HW95 because I also believe that the flatter trajectory of the "light" pellet as more useful than the "heavy" pellet. One thing to consider is that mainsprings are indeed considered "consumables" to be replaced on occasion and with the R9/HW95 a simple spring swap can be done in less than 1/2 hour for about $20 (if you opt for the really good Maccari springs) and you're good for several years more frequent shooting! IMHO....if you don't mind replacing a spring every couple years simply shoot the "heavy pellets" IF they are indeed more accurate for you under field conditions!Ed, is this the tarantula spring you liked? This is still available. http://www.airrifleheadquarters.com/catalog/item/251488/43410.htm
Quote from: Underdog on February 08, 2016, 05:09:42 PMWhen I first got into airguns, one of the first things I read was over on CharlieDaTuna's website about using pellets no larger than about 8 grains because it can damage your spring.Is this true? I've just ordered a HW95 from AoA, with a box of 10.65 grain Baracuda Match H&N pellets. Maybe I should have stayed below 8 grains?What do you think?Kinda late to this party but I have some first hand info concerning CP heavies (10.5 grain) in an R9. When I first introduced my brother to airguns decades ago by selling him one of my home tunes .177 R9s he shot only CP heavies since they were very accurate and they would drive 3/4 way through a grey squirrel LONG WAYS after busting some larger bones. Because of this he had the skill to angle a CP heavy through the vitals of a squirrel from any angle! LOL....when cleaning squirrels with my brother there was one grey squirrel that was hit at the right hip and the CP heavy drove longways through and we found the mangled pellet lodged in the spine at the neck. Here are two 50 yard 3 shot groups (was shooting typical powder burner groups) he shot "back to back" with the R9 I sold him and CP heavies.......Uploaded at Snapagogo.comShooting "heavies" I used to replace his good Maccari aftermarket spring about every two years shooting about a box of CPs a month. After shooting heavies for several years he found that the flatter trajectory of the 7.9 grain CP light trumped the slightly better wind resistance and deep driving CP heavy. After switching to CP lights I only replace one Maccari spring in several years and that spring spent half of it's "life" shooting CP heavies. After replacing that spring with a new Maccari Tarantula spring (my favorite variety no longer being sold) he never replaced it after several years of shooting when I moved to North Carolina. Anywhoo........I've never shot pellets heavier than 8.6 grains from my R9 and heavier than 8.4 grains with my HW95 because I also believe that the flatter trajectory of the "light" pellet as more useful than the "heavy" pellet. One thing to consider is that mainsprings are indeed considered "consumables" to be replaced on occasion and with the R9/HW95 a simple spring swap can be done in less than 1/2 hour for about $20 (if you opt for the really good Maccari springs) and you're good for several years more frequent shooting! IMHO....if you don't mind replacing a spring every couple years simply shoot the "heavy pellets" IF they are indeed more accurate for you under field conditions!
When I first got into airguns, one of the first things I read was over on CharlieDaTuna's website about using pellets no larger than about 8 grains because it can damage your spring.Is this true? I've just ordered a HW95 from AoA, with a box of 10.65 grain Baracuda Match H&N pellets. Maybe I should have stayed below 8 grains?What do you think?
Ha,haIn one of those australian "MAD MAX" movieswhich had LOTS of great bikes-safe bet some version of the Kawasaki 900-1000 was featured I thinkWell there was an old HOT ROD saying posted in a hot rod garageIt said something to the effect "Tell me how much money you have and I'll tell you how fast you can go" something like your 2 stroke 500 Yamaha "enduro"-that vintage with anything like the stock drums-and with the suspension frame limitations of that time-well it would have been an example of that sayingBut the 9.5 SECOND kawasaki-even MORE $$-much more!Ha!You are LUCKY to still be alive!!That 500 YAMAHA would have been a KILLER BIKE -in EVERY WAY!!The Kawasaki 1000--real brakes and lower CG-much "safer" if a 9.5 second bike is "safer"About 5 years ago-finances- age-cell phones texting-late wife's illness-I sold that SR500- over the years I owned 11 different ones-and some of them-literally the same bike-I bought re-bought -more than ONCE-Yeah crazy for cars-trucks-SUV-motorcycles-bicycles too-guns too-dogs and cats too I guess\It is a disease-no cure-
Which is too bad really. I don't mind motorcycle talk, but the information on springers and pellet weight is invaluable, and wouldn't like it to get buried. I'm thankful for folks like Hector who can give us much needed information and perspective on things. (Even if it's far over my head.)I was about to ask what the FPE was on a motorcycle thread that hit a moderator?
Quote from: 39M on February 12, 2016, 05:07:58 AMSo if there's bounce back, that attempts to create a vacuum and slow down heavier pellets, wouldn't a gun with a shorter barrel, like the RWS compact models, be beneficial to those who like to shoot heavier pellets?I've always had a theory like this in pb's, that a light bullet needs a longer barrel than a heavy bullet for complete powder burn due to the difference in acceleration and time spent in the barrel.I believe this line of thinking could lead to more barrel chopping in springers.I had often thought of taking a chainsaw to my AirHawk to slenderize, lighten, and shorten the stock. Now I'm sure a hacksaw should've been a part of the master plan also.Interesting point of view!Of course you know what the real answer is: Get a compact and do some research.There have been worthwhile experiments cutting the barrel progressively and analyzing the performance, but not in rifles with decent sized compression chambers.And comparing two different guns always leaves the researcher with the idea that perhaps the guns were not identical to start with, something that happens a LOT in breakbarrel, long transfer port rifles.The PB's analogy is not as good as it sounds because modern coated powders have an inversely related burn rate. If the bullet is too heavy, peak pressure will be achieved earlier into the bullet's travel through the barrel, which means that most of the acceleration will be gained in the first ¼, but light bullets will keep the pressure rising up to about ½ the barrel length. In the end, the AREA UNDER THE CURVE Pressure vs. barrel travel will be almost identical. Blast and Flash will be different, of course, as anyone that has fired a short barreled magnum knows.So, get a hacksaw or get a compact and let us know. Keep well and shoot straight!Héctor
So if there's bounce back, that attempts to create a vacuum and slow down heavier pellets, wouldn't a gun with a shorter barrel, like the RWS compact models, be beneficial to those who like to shoot heavier pellets?I've always had a theory like this in pb's, that a light bullet needs a longer barrel than a heavy bullet for complete powder burn due to the difference in acceleration and time spent in the barrel.I believe this line of thinking could lead to more barrel chopping in springers.I had often thought of taking a chainsaw to my AirHawk to slenderize, lighten, and shorten the stock. Now I'm sure a hacksaw should've been a part of the master plan also.
Airgun springs are not all made in the same factory of the same metal alloy any more than hi-performance engine springs are! The airgun manufacturers want to be able to sell enough of the airguns they produce to earn a profit. The average airgun buyer will likely NOT shoot it enough to exceed the cycle life of the average quality stock spring, so why put the more expensive alloy spring in at the factory? Even the engines you reference use different types of springs for the different jobs they will be expected to perform. All the different calibers/weights of pellets DO NOT perform at their best on that SAME SPRING that comes stock in all the calibers offered. The valve springs in recip engines ARE of much stronger, more resilient steel alloys and tempers than the factory springs in MOST airguns!There are a VERY FEW makers, worldwide, of HIGH QUALITY springs for use in airguns. The oldest and most well respected innovator/producer in the USA, in this arena since the '80s, is James Maccari of ARH. A coupla others have been trying for decades, and still are, to catch up!
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