aliengravy Posted January 16, 2011 Report Share Posted January 16, 2011 Firstly, If i have a recipe for a 70mm case, and I want to use a 67mm case, can I just shorten the packing wads I put in by 3 mm? Or does the shorter case change the pressures or velocity? Secondly, I have some reloading data, and it just specifies a shot weight and not a size, I assume that means its on to use any size as long as the weight is correct? Sorry for more silly questions!! Quote Link to comment Share on other sites More sharing options...
Andy H Posted January 16, 2011 Report Share Posted January 16, 2011 you have to reduce the powder charge slightly going from 70 to 67mm , Have a look at this nobelsport data for Vectan A1. http://www.nobelspor...les/vec_a1.html Quote Link to comment Share on other sites More sharing options...
Guest cookoff013 Posted January 16, 2011 Report Share Posted January 16, 2011 also, dont try and load a "bird shot" recipe with buckshot. it doesnt respond the same way. (or vice versa) buckshot #4 is the smallest buckshot,all the way to LG / SSG. these are not compatable with birdshot recipes. the lead doesnt flex/compress as much. the recipes are out there, just look for one and select it. thats probly the hardest part about loading. finding a good recipe. i stick to 9000psi, if a load goes pear shaped, it would have to double its psi to even get close to burst pressure. it takes something very special, or something very intentional for that to happen. most modern guns have a burst pressure of 17,000psi. that was generally a rule. i`d expect a baikal to withstand more,(not undamaged though) than a poor(er) quality firearm. birdshot is for birds, anything else is for "other" with any normal recipe, i would happily use any shotsize up to and including #1 and BB. anything else is more of a buckshot type cartridge. Quote Link to comment Share on other sites More sharing options...
aliengravy Posted January 16, 2011 Author Report Share Posted January 16, 2011 So the general consensus is then, that if I wanted to load a cartridge with 6, 5, or 4 shot the recipe would stay the same? :D Quote Link to comment Share on other sites More sharing options...
sitsinhedges Posted January 16, 2011 Report Share Posted January 16, 2011 (edited) I generally try to get a nice crimp and this means filling a case of whatever length with a suitable wad of whatever length so it all works. With fibre especially you just have to use a wad that takes up just enough space for a nice crimp despite what the recipe calls for. I wouldn't worry too much. That said, stop being awkward and just use a 70mm case like everyone else Edited January 16, 2011 by sitsinhedges Quote Link to comment Share on other sites More sharing options...
aliengravy Posted January 16, 2011 Author Report Share Posted January 16, 2011 I generally try to get a nice crimp and this means filling a case of whatever length with a suitable wad of whatever length so it all works. With fibre especially you just have to use a wad that takes up just enough space for a nice crimp despite what the recipe calls for. I wouldn't worry too much. That said, stop being awkward and just use a 70mm case like everyone else He he i did think about ordering a load of new 70mm cases, and just using them, But I want to load subs and I have just over 50 Eley Hushpower cases here but they are 67mm! So do i use new 70mm blank ones? Or the nice pretty hushpower printed 67mm ones? Quote Link to comment Share on other sites More sharing options...
sitsinhedges Posted January 16, 2011 Report Share Posted January 16, 2011 He he i did think about ordering a load of new 70mm cases, and just using them, But I want to load subs and I have just over 50 Eley Hushpower cases here but they are 67mm! So do i use new 70mm blank ones? Or the nice pretty hushpower printed 67mm ones? Go to a clay ground on a sunday afternoon with a sack and fill it with empties for free. Quote Link to comment Share on other sites More sharing options...
aliengravy Posted January 16, 2011 Author Report Share Posted January 16, 2011 Go to a clay ground on a sunday afternoon with a sack and fill it with empties for free. :lol: :lol: :lol: Be just my luck and i'd get home and find they are all 67mm!! Quote Link to comment Share on other sites More sharing options...
fruitloop Posted January 16, 2011 Report Share Posted January 16, 2011 dont pay for empty carts go to the clay ground and get all you want for free Quote Link to comment Share on other sites More sharing options...
fruitloop Posted January 16, 2011 Report Share Posted January 16, 2011 (edited) you can get some lovely high brass and all in diferent colours and makes i bet sits is with me with that one Edited January 16, 2011 by fruitloop Quote Link to comment Share on other sites More sharing options...
aliengravy Posted January 16, 2011 Author Report Share Posted January 16, 2011 Right OK, So I should stick to 70mm cases as well then! Thanks for clearing up all these little questions I have! Now all i've got to do is find some vectan AS powder local Quote Link to comment Share on other sites More sharing options...
aliengravy Posted January 16, 2011 Author Report Share Posted January 16, 2011 Use what you like the used cases will be fine, I have not loeaded subs, but I guess the reduced powder charge will result in longer length wads than for a normal full charge. so you will have to experiment and may be cut a wad in half or thirds to add to a full wad to fill the case as required. Some kind forum member may already have a load they may like to share. Yes I will already have to use a 20mm fibre wad and a 5mm fibre wad (Which will be a 20mm cut in 4!) So i was hoping i could leave out the 5mm wad and use a 67mm case! But being new to it I was worried about the pressures!! Quote Link to comment Share on other sites More sharing options...
aliengravy Posted January 16, 2011 Author Report Share Posted January 16, 2011 67mm case will be fine. Why not try both and prove it to yourself. Because I value my gun and facial features enough to not try it without asking :lol: :lol: You guys are giving me the confidence to just go for it though! Quote Link to comment Share on other sites More sharing options...
aliengravy Posted January 16, 2011 Author Report Share Posted January 16, 2011 I thought that too, although I was getting the opposite impression from clay and game! But I think it was sitsinhedges that pointed out to me there is a recipe that is the same components just more grains of powder for a "sonic" load. I haven't seen the recipe he states "officially" listed though. (perhaps he could tell me where he saw it) So in theory the pressure should be low, if there is a sonic load with the same ingredients!! (or so I would have thought!) Quote Link to comment Share on other sites More sharing options...
Guest cookoff013 Posted January 17, 2011 Report Share Posted January 17, 2011 you of little faith By the very nature of a subsonic load pressure will be much lower than a standard load. no, it just depends on the powder. vectan AS is slower than titewad. titewad gives higher pressure with subsonic loads compared to AS. titewad is a better powder for subs application. whereas AS is better for 1oz loads (above 1200fps) the pressure for titewad, 1,1/8oz load is about 7000psi (which is very respectable) most powders get very twitchy below 5000psi, some are twitchy at 7000psi (longshot, h110 .. to name a few) there are even faster powders that need higher powder charges, ~25 grains + but they can only push 1oz of lead 900fps. i`d get a more modern book, than 1955, most powders used today, werent even invented back then. Quote Link to comment Share on other sites More sharing options...
Guest cookoff013 Posted January 17, 2011 Report Share Posted January 17, 2011 12gauge i`m sure the book is a good read, even my lyman 5th, is getting abit dated with no speed steel recipes. it is 5 years old now. its data is stil valid, but more powders have come on the market, they arnt in it. several shot types have come out. they are not in. i`d rather trust that than a book from `55. i`m not saying th principals or physics have changed. wad height is a good topic to discuss, the longer the wad cup, (notice, i said wadcup) the more contact and the more resistance a load will have. pressure etc. in 1955, i`m sure the speed of shells were slow. and have got faster, and faster. they even tried shooting steel back then. i bought a lb of titewad for £20 (think it was £17.80). it is redily available as it was the most popular choice for light cartridges. it works out at... 4.4p a shot, that is quite cheap, especially as subsonic ammo is up at £240 /k makes you think eh? for a sub load i think it is the one. Quote Link to comment Share on other sites More sharing options...
Guest cookoff013 Posted January 17, 2011 Report Share Posted January 17, 2011 i think there is a vectan equivalent, lowsonic. the load isnt on the limit when 16 grains are used. i think (i read) 18 grains gets the load to 11000psi still safe ! safe loading. my point was its safer to knock off 2 grains from the right kind of recipe, than to knock off 1/3 the charge to bring the speed down. i bet the titewad load will still run nicely in wintertime. where coldness affects performance. Quote Link to comment Share on other sites More sharing options...
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