SCJ429 wrote:You can over stabilise a bullet, that is to say you can increase the rpm to exceed the design limits of the bullet and the jacket comes apart. I was using 62 grain bullets and at speeds over 4000 fps the bullets did not hit the target. I am not sure of the exact speed because the chronograph could not see them. I assume they came apart as soon as they left the barrel.
A 1:8 twist barrel will shoot most bullets if you keep the speed at a reasonable level for lighter bullets.
As said earlier, it is easier to rebarrel in 6.5 Lapua, Winchester, Swede or Creedmoor and shoot 140 grains.
I second your idea of a 6mmBR there MM. I have a straight BR as a hunting rifle and have taken goats and pigs with it.
duncan61 wrote:I completely understand where you are going with this line of thinking Tilb004.I have done it myself and over the years watched many others.When I loaded shotgun I was obsessed with getting all this performance and you end up back to standard after learning that it does not help.Its a lot of fun at the time but you have asked for advice.I maintain if you feel you need a heavier bullet get a bigger chambering.The .243 will kill any pig in Australia with 80-90gn pills designed for hunting.The biggest pig I have ever seen on a ute was a big Ginger boar a pro shooter took with a .223 and a head shot in the Kimberlys It was hanging on the rack and its snout was nearly on the ground and was around 400 lb.We all underestimate the power of centrefire rifles I have worked with a property owners son who used a 22/250 and it can do a lot at a long way.I am not sure how big the pigs are where you are but I have dropped heaps at night with a neck shot from my .222 50gn doing about 2700fps.I have nearly 300 reloaded .243 and they are all 80gn projectile one of my team went the heavy bullet pathway and all he did was make a lot of noise and missed a lot.when we set up a target his bullets were spraying all over the place.All this rebarreling nonsense is for target shooters trying to clover leaf at long range The accuracy test for pro culling roos is 5 shots into an 80 mm circle at 100 metres and a standard .243 will do that out the box.Good luck with it its all good fun and I look forward to seeing which way you go
SCJ429 wrote:I used 2217 and the speed was 3,255 fps. I also tried 2213 but only pushed it to 3132 fps. It had more in it but I never went back to see how far.
SCJ429 wrote:You are running your 243 very mild there, my little 6mm BR can shoot a 90 grain projectile at 3000 fps. I shoot a 105 projectile out of my 243 at more than 3,300 fps and get good barrel and brass life.
SCJ429 wrote:It isn't a criticism, just pointing out the potential of this case. I am glad you enjoy hunting with your 243.