Jaymo Posted January 4, 2014 Report Share Posted January 4, 2014 (edited) Currently throw lots of 220 Sierra HPBT's down the range. But wish to take it to Bisley which I believe has a HME restriction of 3500ft/lbs Anyone recommend a suitable load? Thanks Edited because this numpty couldn't spell throw correctly the first time- must read my posts before pressing the "Post" button Edited January 4, 2014 by Jaymo Quote Link to comment Share on other sites More sharing options...
Underdog Posted January 4, 2014 Report Share Posted January 4, 2014 Have you googled it? https://www.google.co.uk/search?q=300+win+mag+reduced+load+data&rls=com.microsoft:en-gb:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7_____en-GB&gws_rd=cr&ei=1kzIUvfTFrGS0QXDh4CwDQ Good cartridge by the way. Think Blunderbuss has one! U. Quote Link to comment Share on other sites More sharing options...
Jaymo Posted January 4, 2014 Author Report Share Posted January 4, 2014 Underdog You know what - I didn't google it and I should have Did try a search on Yahoo but must have phrased it incorrectly as didn't get anything like those results. Lovely cartridge and love the gun too, really feels like your shooting something when the brass is the size it is. Nearly went 460 or 338 but the range has a few restrictions so couldn't. Quote Link to comment Share on other sites More sharing options...
Underdog Posted January 4, 2014 Report Share Posted January 4, 2014 I bet 338 is very good. I like these big boomers....they give a nice big shove. I don't like shooting them benched though. standing is fine with me! U. Quote Link to comment Share on other sites More sharing options...
Jaymo Posted January 4, 2014 Author Report Share Posted January 4, 2014 Just chuck a mat on the floor and I'm happiest. Just found the info I need- should have gone to vihtavuori website first as I use N170 and then using their date plus a muzzle energy calculator I can see that under 3500 is easily achievable. Quote Link to comment Share on other sites More sharing options...
rem708 Posted January 5, 2014 Report Share Posted January 5, 2014 I don't know if you are a member of a club or not and what conditions you have on your license. If you are a club member then you can only shoot as a civilian on a military range (i.e. Bisley) if issued with a competency card certified by the chairman of a home office approved club or by the NRA. You may shoot without holding such authority if supervised on a one to one basis by an approved club member or NRA trainer. The limits on muzzle energy are slightly lower than you think - 4500 J (3319 ft lb) The energy is defined in joules because its a better measurement system but how many shooters every use it when talking about bullet balistics? The rules for the use of HME (high muzzle energy) up to a ceiling of 7000 J energy are quite rigorous and unless you are going to shoot it regularly then my advise is to avoid. You can't just bowl up to Bisley with home loaded ammunition unless you are sure its going to be below the 4500 J limit. The Chief Executive and its officers can ask for sample rounds for testing if they are not happy and may do spot checks. The consequences of exceeding range rules are quite far reaching (believe me!) If you are unsure then book some time on the zeroing range and check your rounds with a chronograph having advised the range office. If you're a competent re-loader then I would suggest downloading to give a muzzle velocity of no more than 2600f/s and you should be under the HME requirement with the 220gn HPBT Sierra bullets. I'm a club chairman and have to issue these cards so my neck is on the line if any of my members don't comply with the regulations...... Just for the records .338 is NOT permitted on any Bisley range! Quote Link to comment Share on other sites More sharing options...
Jaymo Posted January 5, 2014 Author Report Share Posted January 5, 2014 Rem708 Thank you for your post. Yes, I should have consulted my 'Bisley Bible' for the exact Energy limit but as usual- just like my info request was me being lazy Fortunately I do have my Competency Certificate as am a Member of the NRA for some while. Am I a competent reloader? well I hope after all these years I am. Yes of course I plan to use a chrono- all well and good using load data but the only way to be sure is a chrono,calculator and my trusty Kestrel computer for temp & pressure. Will most prob come back on the bullet weight too. Quote Link to comment Share on other sites More sharing options...
rem708 Posted January 5, 2014 Report Share Posted January 5, 2014 Hi Jaymo, I personally love sierra bullets so would definitely suggest trying some more of their match king but slightly lighter to help keep the energy down without sacrificing velocity. I've been loading a long time but never belted cases. I have just been asked to assist someone with some 7mm STW so I did some research and case sizing has its own unique set of problems! I'd be interested in how you get on with them - have you had troubles with case crushing? Quote Link to comment Share on other sites More sharing options...
Jaymo Posted January 5, 2014 Author Report Share Posted January 5, 2014 All my .300 brass is as follows. Factory load Fire formed Check OAL Lee full length resize Inspect and reload Bin em after four cycles- expensive I know but it was never going to be a cheap cartridge The only problems are the usual hydro locking around the neck giving some rippling if too much lube is present- it's a big case so needs a fair amount but at the same time not too much, balancing act it is. Also I have always loaded with N170 to the lowest pressures but with a lighter bullet I think n160 or n165 will be needed. Quote Link to comment Share on other sites More sharing options...
Bewsher500 Posted January 6, 2014 Report Share Posted January 6, 2014 i use N160 up to 208gr not sure whether significantly downloading a heavier bullet is as effective as just loading a lighter bullet to acceptable velocity levels 208gr at 2680fps doesnt sound as attractive as 175gr at 2900fps I have some SMK's in 175gr Quote Link to comment Share on other sites More sharing options...
Jaymo Posted January 6, 2014 Author Report Share Posted January 6, 2014 175 at 2900fps is 4400j or 3286ft/lbs Which is in, but v close to the limit- but could be tinkered to consistently produce 3200ft/lbs Def worth consideration and thank you Quote Link to comment Share on other sites More sharing options...
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