ant.mass Posted February 20, 2018 Report Share Posted February 20, 2018 (edited) Anyone used theses with Vihtavuor N133 if so what was your charge weight and CL & OAL in a 1 in 14 twist form i have seen 24gr of N133 powder is a good load and CL 1.75 & OAL 2.24. just trying find whats best? Edited February 20, 2018 by ant.mass Quote Link to comment Share on other sites More sharing options...
rangey Posted February 20, 2018 Report Share Posted February 20, 2018 25.5gr n133 .50gr vmax 2.270 oal works great in my 223 but don't go straight to my load...work up Quote Link to comment Share on other sites More sharing options...
ant.mass Posted February 20, 2018 Author Report Share Posted February 20, 2018 (edited) Im wasn’t going to I’ll start at 23gr and ill load five rounds and slowly work my way up so your saying the oal is 2.270 and not 2.240 Edited February 20, 2018 by ant.mass Quote Link to comment Share on other sites More sharing options...
rangey Posted February 24, 2018 Report Share Posted February 24, 2018 2.270 is what I load mine at,and works well.again worth trying at different lenths one you've got your powder charge right Quote Link to comment Share on other sites More sharing options...
cervusman Posted March 7, 2018 Report Share Posted March 7, 2018 Vit website for N133 and 50gr bullet says start load 24.1 for 3107fps, max load 25.9 for 3533fps. Quote Link to comment Share on other sites More sharing options...
Savhmr Posted March 8, 2018 Report Share Posted March 8, 2018 Try using the OCW load development. You'll save time and money and get the best load: http://optimalchargeweight.embarqspace.com/ Quote Link to comment Share on other sites More sharing options...
dicehorn Posted March 15, 2018 Report Share Posted March 15, 2018 On 20/02/2018 at 10:36, ant.mass said: Anyone used theses with Vihtavuor N133 if so what was your charge weight and CL & OAL in a 1 in 14 twist form i have seen 24gr of N133 powder is a good load and CL 1.75 & OAL 2.24. just trying find whats best? I have reloaded for 3 rifles in 223 using N133 with a 50 gr Hornady V Max but I found despite being very accurate, when I went over 25gr the case fill was well over 106%. One rifle's recipe was 25.3 gr of N133 seated at COL of 2.257" but this gave a fill ratio of 117% in Lapua brass with an average H20 of 28.56gr - way over the top and the powder had to be dropped in using a powder dropper to avoid crushing the granules. This recipe gave consistent groups of 1/4MOA Because of the fill ratio I looked around for another Viht powder that would burn a little faster and therefore would need less powder to do the same job. Started using N120 with a burn rate of .8153 (N133 is .7350) After doing an OCW test (as recommended above) all at 40 thou back, decided from the results that 22 gr was worth trying again at 60 thou back and also 22.6 gr but down .1 gr to 22.5. Finally went with 22.5 gr which gave an acceptable fill ratio of 104.4% and 3328 fps over my chronograph On 20/02/2018 at 10:36, ant.mass said: Re my last post this was the final test with this rifle using N120 and 60 thou back Quote Link to comment Share on other sites More sharing options...
dicehorn Posted March 15, 2018 Report Share Posted March 15, 2018 Ant.Mass - Not saying you are wrong but are you sure that your 223 is a 14 twist? Most 223's that are not for long range shooting (8 to 10 twists) are usually a 12 twist Quote Link to comment Share on other sites More sharing options...
ant.mass Posted March 15, 2018 Author Report Share Posted March 15, 2018 dicehorn thanks for the info and testing mate i haven't had a chance to do any reloading / testing as i ve been too busy and as for 1 in 14 twist im only going by what the guy said when i bought the gun off him he said it was a 1 in 14 twist Quote Link to comment Share on other sites More sharing options...
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