Big Dog Posted June 1, 2005 Report Share Posted June 1, 2005 I have a little confusion around the progression of rifle bore E.g .22LR .17HMR .22WMR .22 Hornet etc Can someone take the time to buid the hole picture for me. I get really confused when it get up into larger bores Thanks guys Quote Link to comment Share on other sites More sharing options...
Gemini Posted June 1, 2005 Report Share Posted June 1, 2005 Well, to keep it as simple as possible I won’t go into minute detail, but the calibres (not Bores, that’s for shotguns) that you are describing are as follows- .22 LR- this is a small rimfire cartridge that consists of a (normally) 40grn bullet .224 in diameter, in a brass case approximately 15mm long, depending on make etc. A .22lr in low velocity will give you @ 1050 fps. The .17 HMR is a bullet of .17 calibre in a case that has been “Necked down” from a .22 magnum to accept the little .17 bullet, and will put out velocities of @ 2500 fps. The .22 Magnum is again a .22 bullet in a longer case (therefore a Magnum) which has been designed to hold more powder and thus give higher velocities (@ 2200 fps) and power. The .22 Hornet is a centrefire round and is therefore capable of being loaded with a .22 bullet of either 40 grns or 50 grns for best effect, although some people do load with either lighter or heavier bullets. I know that there will be more detailed answers, but this is about as simple as I wanted to get. G.M. Quote Link to comment Share on other sites More sharing options...
ferretmanabu Posted June 1, 2005 Report Share Posted June 1, 2005 I've never understood the difference between a rimfire and a centerfire. What exactly do they mean? Quote Link to comment Share on other sites More sharing options...
Gemini Posted June 1, 2005 Report Share Posted June 1, 2005 (edited) I suppose it’s easier to show you than to try and explain,but a rimfire is simply a case that has the primer in the RIM. And a centrefire has a separate primer in the CENTRE- http://img.photobucket.com/albums/v186/Tenex/RIMEFIRE.bmp http://img.photobucket.com/albums/v186/Tenex/HANDGUN.jpg Edited June 1, 2005 by Gemini Quote Link to comment Share on other sites More sharing options...
the last engineer Posted June 1, 2005 Report Share Posted June 1, 2005 Round of aplause for that man , keep it simple simon,nicely done Gemini. short sweet and to the point Martin Quote Link to comment Share on other sites More sharing options...
Big Dog Posted June 1, 2005 Author Report Share Posted June 1, 2005 I have a little confusion around the progression of rifle bore E.g .22LR .17HMR .22WMR .22 Hornet etc Can someone take the time to buid the hole picture for me. I get really confused when it get up into larger bores Thanks guys B) Sorry I must not have made my self clear. What I want to find out is the progression of the calibers. And yes you are right to correct me on bore I was in a hurry at the time and couldn't remember how to spell caliber!! unforgivable I know but hey I enjoy shooting not spelling I would like a list of the caliber progession from the smallest to the largest. My example in the 1st post was just to kick the list of. E.g. .22lr up through the 222, 223, 243, and so on. Basically how many calibers are they from the small 22LR to Hope that is better?? Thanks Quote Link to comment Share on other sites More sharing options...
Gemini Posted June 1, 2005 Report Share Posted June 1, 2005 17Mack 2 17HMR 17 MK IV 17PPC 17 Remington 20 Vartag 20 Vartag Turbo 22 short 22 lr 22 mag 22 Hornet 218 Bee 221 Remington Fireball 222 Remington 222 Remington Magnum 223 Remington In Progressively Shorter Barrels 223 Remington 223 Remington Factory Ammo V Reloads 223 Ackley Improved 22 PPC USA 22 BR Remington 224 Weatherby 22-250 Remington 22-250 Ackley Improved 5.6 x 57 RWS 220 Swift 22-243 Middlestead 22-6MM Remington 6MM Ackley 6MM Remington 6MM BR Remington 6MM-284 Winchester 240 Weatherby Magnum 243 Ackley 243 Winchester 244 H&H Magnum 250 Savage 250 Ackley Improved 25-06 Remington 25-284 Winchester 25-300 Winchester Magnum 6.53 Scramjet 257 Weatherby Magnum 257 Ackley Improved 260 Remington 6.5 x 57 Mauser 6.5 x 58 Portuguese Mauser 6.5-06 Improved 6.5 Roberts Improved 6.5 X 6.8 RWS 264 Winchester Magnum 6.5 MM STW 6.5-284 Winchester 6.5 X 55 Swedish Mauser 270 Ackley 270 Weatherby Magnum 270 Dakota 270-284 Winchester 7mm Remington BR 7mm STW 275 Rigby 7mm STW Long Range Target Loads 284 Winchester 7mm Remington Magnum 7mm-08 Remington 280 Ackley 7.21 Firehawk 7 X 64 Brenneke 7 X 57 Ackley 7.62 x 39 Russian 30-06 Springfield 300 H&H Magnum 300 Phoenix 30-8 Remington Magnum 30-378 Weatherby Magnum 300 Weatherby Magnum 300 Winchester Magnum 300 Pegasus 300 Whisper 308 Winchester In The Steyr Scout 30-338 Winchester Magnum 30-404 Improved 300 Remington Ultra Magnum 8 x 60 s 338-06 338 Winchester Magnum 333 OKH Belted 338 Lapua Magnum 338-404 Jeffery 340 Weatherby 338 Remington Ultra Mag 338-378 KT 330 Dakota 350 Remington Magnum 9.3 x 62 Mauser 9.3 x 64 Brenneke 375 H& H Magnum 375 Dakota 375-404 Jefferey 375 Weatherby 378 Weatherby 9.53 Saturn 416 Taylor 416 Hoffman 416 Remington Magnum 416 Weatherby Magnum 416 Rigby 450/400 Jeffery 3" 404 Jeffery Nitro Express 450 Ackley Magnum 458 Winchester Magnum 458 Lott 450 Vincent Short 450 Vincent Long 460 Weatherby Magnum 470 Nitro Express 475/416 Rigby Improved 500 Jeffery 505 Gibbs 500 A-Square 577 Nitro Express 3 Inch 577 Tyrannosaur 585 Nyati 600 Nitro Express 700 Nitro Express Perhaps others will fill in those I have missed. G.M. Quote Link to comment Share on other sites More sharing options...
ferretmanabu Posted June 1, 2005 Report Share Posted June 1, 2005 Thanks for that reply Gemini. Makes it a lot simpler although the name of the rounds says it all. Are shotguns therefore classed as centrefire? And also, what effect does the rimfire/centrefire primer have on the use of the round. Many thanks. P.S. sorry for the thread hijack. Quote Link to comment Share on other sites More sharing options...
hawkeye Posted June 1, 2005 Report Share Posted June 1, 2005 you missed the cannon B) Quote Link to comment Share on other sites More sharing options...
Gemini Posted June 1, 2005 Report Share Posted June 1, 2005 Rimfire priming compound will have an effect on the performance of a .22 round due to the fact that it is an explosive in its own right. So it does stand to reason that the amounts of primer placed into the rim must be constant from round to round. This is where the “Eley prime” system comes into its own. The priming compound is a mixture of ingredients, which when mixed form a highly dangerous explosive called “Lead styphnate”. This is a non corrosive compound but is highly explosive. To make it safe to use, the ingredients are mixed together in water, this prevents anything exploding as the mixture is safe whilst wet. The mix is then dropped into the cases using a machine which drops a tiny measured amount into the bottom of the case and capillary action takes it into the rim. The cases are then dried in a warm oven to dry out the water, leaving the dry primer set in place. Eley actually won an industry award for inventing this process which used to be extremely hazardous to the workers in the manufacturing sheds at Witton. Centrefire primers can also have an effect on the performance of the powder and the manner in which it ignites, and thus on the performance of the bullet. Some loads do actually state to use Magnum primers for better powder combustion. G.M. Quote Link to comment Share on other sites More sharing options...
rjimmer Posted June 2, 2005 Report Share Posted June 2, 2005 All that should have learned him! Quote Link to comment Share on other sites More sharing options...
Sergeant Posted June 3, 2005 Report Share Posted June 3, 2005 (edited) This should give you an indication of their relative sizes. From left to right, .308 (7.62) .243win .223 (5.56) unknown, probably used in a machine pistol, MP40 DeLisle CC? L12 A1, .22LR Edited June 3, 2005 by Sergeant Quote Link to comment Share on other sites More sharing options...
Big Dog Posted June 4, 2005 Author Report Share Posted June 4, 2005 In my first career I served my time as a carpenter under a MASTER carpenter. What a privilege that was. It is alway a privilege to learn from a MASTER. Thank Gemini you sure are a MASTER. Thanks to Sergeant this has been great. Quote Link to comment Share on other sites More sharing options...
jim_whitson Posted June 4, 2005 Report Share Posted June 4, 2005 So, why are centerfire rounds automatically more powerful? Or are they? I'd have thought that the method of ignition wouldn't have had that much impact on the overall power of the explosion... Quote Link to comment Share on other sites More sharing options...
dunganick Posted June 4, 2005 Report Share Posted June 4, 2005 the use of a centerfire primer just makes it possible (in most cases......not with millitary primers) to re prime the case and hense re-use the case, it is not done to my knoledge on smaller cases becuase the cost of the case is not great enough for it to be of a worry. Quote Link to comment Share on other sites More sharing options...
Gemini Posted June 4, 2005 Report Share Posted June 4, 2005 What you also have to remember is that there is a miniscule amount of powder in a .22 rimfire case, can’t remember how much but it is somewhere @ 1-2 grns. Now compare that to a small centrefire cartridge like the .22 Hornet which can take from 7 grns of 2400 up to 12 grns of powder depending on what sort you use. Then compare that to a .577 Tyrannosaurus which can take as much as 185 grns of Vithavuori N550. Can’t say as I would want to shoot one though. :( G.M. Quote Link to comment Share on other sites More sharing options...
dunganick Posted June 4, 2005 Report Share Posted June 4, 2005 yeh you seen the video's on accurate reloading of saeed's friends shooting that......lmao.......the look on some of their faces Quote Link to comment Share on other sites More sharing options...
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