RE: 180 gr. load for 300 RUM
 

I also found the scirocco to build pressure much sooner than other bullets.As well,copper fouling was extreme with my rifles.

RE: 180 gr. load for 300 RUM
 

Same here stubble. I could get away with that load with just about any nosler or hornady, but not a scirroco.

RE: 180 gr. load for 300 RUM
 

I too have had to back off loads a little for the Scirocco. Even if they can't be pushed quite as hard as other bullets with more brittlejackets and less bearing surface, the ballistic coefficient is so high and the terminal performance is so goodits a worthwhile trade off, IMO.

RE: 180 gr. load for 300 RUM
 

I prefer to push the barnes tsx at higher velocity,with a great ballistic co-efficient,with less fouling,and even more penetration and retained weight when usedon big game.

RE: 180 gr. load for 300 RUM
 

Hey Stubble, Sounds like I'm going to be shooting that TSX. Any suggestions on how much RL 22 I should put behind it to get your kind of performance? Thanks

RE: 180 gr. load for 300 RUM
 

Anyone know the BC on the Barnes 180 tsx? Thank you all for all your help! OK....disregard...found it and .511

RE: 180 gr. load for 300 RUM
 

Actually it is .552 the TSX is the boattail version not the flat base version.

RE: 180 gr. load for 300 RUM
 

Since I use r-25,I can't tell you how much r-22 to use.I found that r-25 gives the best accuracy and velocity in my rifles. I should also mention that after shooting the 180gr tsx out to 500 yards,the bullet drops more than it should for a ballistic co-efficient of .552.The trajectory is nearly identical to that of the 180gr ballistic tip which has a BC of .507.Just one morereason not to trust everything that the manufacturers print.I chronographed my loads so my velocities were actual and not estimated.

RE: 180 gr. load for 300 RUM
 

Thanks Stubble.....that BC thing is kind of a bummer though because that is one of the things Leupold will use when they figure the dial for my scope. Think I should just tell them the BC is more like .510 or something? I guess I'll just start with the max load of R-22 and see what happens.

RE: 180 gr. load for 300 RUM
 

I would not suggest you do that, it's a good way to get yourself in TROUBLE.

If you are bent on getting Leupold to make you specific turrets for your load I would not rely on any book, manual, internet forum friends suggestion. Book B.C. values are not written in stone and do change with changes in velocity, tempature and atmospheric conditions.
The best way to know is to go and actually shoot the ranges you desire. This will tell you what your particular gun/load combination does....and not just a guess or suggestion from a ballistic chart.

Dont get me wrong, ballistic charts can be helpfull but are only a guide. Look at any of them and they will list a certain rifle/pressure barrel, case, primer,bullet, tempature etc....these are all variables and chances of your gun duplicating them is nill. What works in one rifle wont for another.

Getting the Oehler 43 personal ballistic laboratory would help taking the guess work out as it does alot of things including giving pressures and actual B.C value. It will tell you what the load is doing in YOUR gun.

Anything else you read or hear of, whether it be here, in a magazine pertaining to loads, pressures are only guess's. Too many variables are involved.
The quote above is scary and tells me that you dont mind taking risk even if they might me harmful, that just my $.02 . Maybe I have misunderstood the statement and if so I am sorry. With the ease of getting information on the web there is not much accountabilty, be very carefull. Stay safe........