Recent content by groper

Re: 338 Bullet Testing / Demonstration LV Nev. I can't believe I'm even going to bother posting in this thread as we've heard this all before - numberous times in fact. I've already stated the problems with my projectiles - the accuracy is poor and I'm not ashamed to admit it. This makes...

Re: 375cal and 338cal scorpion projectiles its been a long while since ive posted anything... but i though i ought to give an update for those who are interested... Ive been faced with many challenges, the most frustrating is with limited number of machine shops who have the right type of...

Re: 375cal and 338cal scorpion projectiles Unfortunately suppressors are illegal/restricted in australia so its difficult to test this theory out. I do know however, that the increased lift from the flat surfaces on the tail can induce upto twice the initial yaw angle compared with a normal...

Re: 375cal and 338cal scorpion projectiles Its been a while since my last update, due to the fact we havnt been able to shoot anymore - our range has been closed until the range inspector has his requests rectified... Anyway, some more CAD images showing the unique scorpion assymetric...

Re: Post Transonic-Sub MOA Accuracy shorter length boat tails = better transonic stability. shallower angle boat tails = better transonic stability. Reverse also holds true, ie. longer and steeper boattail projectiles = worse stability. These are not the only influential factors, but they...

Re: 375 Viersco Mag Ok people, heres a pic of what scorpion projectiles is all about... They shoot subMOA repeatably out to very long ranges and the BC is ridiculous. I can not get them to shoot 1/2MOA however... I still havnt given up on this concept just yet, maybe the next revision will...

Re: 375 Viersco Mag the projectiles are already stable and have been so for quite some time... the problem is accuracy, they will not shoot 0.5MOA regardless of any load and i have tried quite a few in the 375CT. I may give up on this concept in favour of a conventional design projectile...

Re: 375cal and 338cal scorpion projectiles As an update on the .375`s... So far i can get consistent sub-MOA 5 shot groupings at all distances out to +1000yds from my 10 twist barrel in the test rifle using a load of 135grains of H50BMG seated 40-50thou off the lands... i have <span...

Re: 375cal and 338cal scorpion projectiles details on the 338 will follow in a separate thread, id like to focus on the 375 in this thread; Required elevation for 2050yds from a 218yd zero = 16.7mils velocity = 3030fps atm pressure = 966mB temp = 26deg C required elevation for 1000yds from...

Just a little sneak peak / teaser... more to follow soon along with range reports when we`ve sorted thru all the data etc... The 375cals shown in the pic below, are stable from a 1:10twist at all velocities tested from 2950-3150fps - where pressure limits any further velocity from a 34in...

Re: . Cutting Edge 375 projos augustus, why do you think the 8 twist was inadequate? minimum spin is best, going down to faster than nessesary twist goes against good practice... whats the fouling like in the gain twist barrel using these, i wouldnt think they would suit this type of barrel...?

Re: Best long distance rifle? Oregon, You might wanna check your wiki source again... ill save you the trouble; <div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: wikipedia</div><div class="ubbcode-body"> Supersonic range For a typical .408 Chey Tac chambered gun...

Re: Best long distance rifle? Really? damn... i didnt realize youve been around here for a while and i really only have a basic internet education... i guess i should have read more wikipedia and wised up before i opened my mouth... When are you going to order your parts and build one of...

Re: Best long distance rifle? <div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: oregon</div><div class="ubbcode-body">The ultimate long range gun, that you can still carry at about the same 16 pound gun you have now ... If money is no object. My vote if you want to...

Re: 50cal bullet design... umm, 14% of what? Just the nose cone efficiency or the total drag on the projectile, or the change in BC? If just the nose cone, 14% compared to what simple radius? An agressive large radius secant ogive, or a small radius tangent ogive, and over what aspect ratio...