shrek Posted October 9, 2008 Report Share Posted October 9, 2008 Rite lads, iv never been one to look into twist rates and bullets weights because iv never really payed much attention, however this is just a quicky for you fellas that know your stuff: My 308 has a 24" pipe with a twist of 1-14 I have been told that this rate will only stabalise 150 to 155 gr bullets....... Is this true, i would like to loads up some lighter bullet loads just for messin about long range varminting, will lighter bullets however stabalise on such a slow twist? Or should i just stay with my 155 scenar loads for paper and gong, and shoot vermin with the 6BR? Link to comment Share on other sites More sharing options...
baldie Posted October 9, 2008 Report Share Posted October 9, 2008 It should stabilise lighter bullets no problem. If anything, you are getting to its top end with a 155 grainer. Link to comment Share on other sites More sharing options...
PeteL Posted October 9, 2008 Report Share Posted October 9, 2008 Hi Shrek, According to the table that I have, that 14" twist appears to be fine for 155 gn bullets, but it depends on their length. The Greenhill Formula requires calibre and length, but not weight. As for the lighter ones, say 130, 125, 110 etc, they will be stabilised. The twist required will be slower than 14" so you'll be ok. The rule is the longer the bullet(which usually means heavier), the faster the twist required to stabilise. There will, I'm sure, be others on this forum who are more knowledgeable than myself who will be able to give you a more comprehensive answer. Peter Link to comment Share on other sites More sharing options...
silentsoulsleave308holes Posted October 9, 2008 Report Share Posted October 9, 2008 14 twist was made for 155 and from a 24" you wanna be sending them at 2650 an awsome load to use is 44gr varget ccbr2 primer and 155 scenar great to 1000+ Link to comment Share on other sites More sharing options...
shrek Posted October 10, 2008 Author Report Share Posted October 10, 2008 Silent that sounds about right actually, i got a super accurate load with vit N150 which would have been doing about that speed, but the ballistics data said that it wouldnt be super sonic past 800? Thats why i used N140 and am now pushing it at 2940, which is equally accurate and still super past 1100 yards (According to my data) Link to comment Share on other sites More sharing options...
stag1933 Posted October 10, 2008 Report Share Posted October 10, 2008 Hi Shrek. According to the modified Greenhill formula 157gr would be the ultimate . Lower weights would be no problem but heavier ones could be. Regards HWH. Link to comment Share on other sites More sharing options...
stag1933 Posted October 10, 2008 Report Share Posted October 10, 2008 Hi again Shrek. Here is a load I used in my .308 Sako a few years ago. Bullet, Speer TNT HP 125gr. It worked like a charm on furry and feathered vermin ! HWH. Link to comment Share on other sites More sharing options...
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