RE: 180 gr. load for 300 RUM
 

This is the only way to know whatthe actual trajectory of your load is.I would do this before spending money on special scope dials.I also wholeheartedly agree with not starting with a max load.Doing so could result in a locked up action or worse.Start at a reduced load and work up while checking for pressure signs.

RE: 180 gr. load for 300 RUM
 

ATK, Blount, Speer, Omark, CCI are all the same company and are in my home town. A buddy of mine had the engineers out there look his bullistics over, sent that info to leupold. Maybe he was just lucky, but he got great results and I've seen him kill coyotes at over 700 yrds. His scope dial is right on the money. When you are talking about 1000 yards, I don't know anyone who is going to let me shoot at his house to figure my bullet drop. Thanks to all you guys who have helped me out on this. Good luck this season!

RE: 180 gr. load for 300 RUM
 

I have fired loads at 500 yards and seen significant differences between the bullet manufacturers trajectory charts and the actual trajectory out of my rifle.This is in spite of the fact that I actuallychronographed my loads and did not use estimated velocities as most people do.At 1000 yards the differences could be much greater.The ONLY ACCURATE METHOD to determine trajectory of a given load in your rifle is to actually fire that load in your rifle at the given distances.

RE: 180 gr. load for 300 RUM
 

RA, you can know everyone is the business, but you can't guess this one, IMO. The most important factor on a bullistics calculator is scope hieght. You can get all the data you can from Leupold on ring heights and base sizes and guessimate distance from barrel center. But if I was putting my hard earned money into it, I for one would verify.

Closest you could come is to buy the scope of your choice and find out MOA change needed at your desired distances and don't touch the rings and send back that scope to leupold to modify.

There are so many tolerances that build up even the MOA clicks. I bet you could take 5 of the finest scopes and zero them at 100 yards, and then zero them at 700 yards, and there would be some variances between the MOA change between the five.

Even a great bullistics calculator is only a guideline.

Just wondering, why don't you want to do the tests on the real gun first? Thats the fun part.

RE: 180 gr. load for 300 RUM
 

Don't think I can come up with enough paper to measure my bullet drop at 1000 yards and my wife gets upset when I shoot at the house. Shot out to 600 yestarday.Think if the experts that build the bullets we shoot can figure within a couple inches of what I now know, I'll put a little faith in them. Speer and Leupold sure did a nice job on by buddies rifle. Thanks again to all you guys for your help....those TSX's are the way to go!

RE: 180 gr. load for 300 RUM
 

No Raco, you don't measure bullet drop at 1000 yards, but if it was me, I would want to know the rise at 100 yards to get to 1000 yards. First off, 1000 yards doesn't interest me. 600 is about enough for me and really my limits. I know 7.1MOA change for me to reach 500 yards. With all the numbers dialed in to my infinity software, it predicts much happier numbers.

Well, its your hard earned money. I don't think people realize the effects after 500 yards even with a 300RUM. From 500 to 525 yards is almost 1MOA change.

RE: 180 gr. load for 300 RUM
 

That is very true.We have a fun shoot every year and it is very entertaining to watch shooters try to hit clay pigeons set out at 500 meters(550 yards) based solely on ballistic calculations and tables.To date the onlyshooters that have been able to hit them consistantly are the shooters that actually checked the point of impact at 550 yards beforehand.The others just raise money for the club by paying anentry feeto try to hit them.

RE: 180 gr. load for 300 RUM
 

Im done with this thread.........when Bigcountry and stubble start agreeing on stuff.......thats when I lose interest!!!!!! Next thing you know Red sox and Yankees fans will start becoming friends. :D

RE: 180 gr. load for 300 RUM
 

What is your charge weight and O.A.L. if you don't mind? I have been trying to get this bullet to shoot and would like to hear another combo option.

RE: 180 gr. load for 300 RUM
 

I have two 300ultramag rifles that use very different charge weights.One rifle uses 88gr of r-25 and the other rifle uses 93gr of r-25 yet both rifles produce velocities within 20fps of each other. The overal cartridge length is 3.670" in both rifles.