| Equipment & Gear > Guns and Ammo |
| 300 RUM xcr |
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| Ironhead:
Here is a chart, The 150 does have a higher BC than a 175 it is also flatter and faster and it lacks energy at 500 yards by a couple hundred pounds which isn't much when your still packin 1500 lbs @ 500 yards. Also I have shot a few deer at close range and can't say I have ripped any in half with the bonded scirocco. The Idea behind a 7mm mag was to get a smaller bullet to fly faster. If you want to push a bigger bullet why wouldn't you step up to a 300? http://www.remington.com/products/ammunition/ballistics/results/default.aspx?type=centerfire&cal=24 |
| bobcat:
It's too bad you can't get a 175 grain Scirocco in the 7 Ultra. You'd have a higher BC and less wind drift. In the 300 Ultra you can get a 150 or a 180 Scirocco. Take a look at this chart and notice how the 180 drops only 2 inches more at 500 yards than the 150 in either the 7mm or 300 Ultra. http://www.remington.com/Products/Ammunition/Ballistics/comparative_ballistics_results.aspx?data=PR300UM5*PR300UM3 |
| BlackTail:
Ironhead, Since you shoot the same gun I thought I would see if you have had similar results. I went out to shoot some 150 sciroccos in my 7mm RUM for the first time. First, I shot at 100 yrds and was shooting about a 1" 3 shot group, 3" high. I then backed up to the 225 yrd range (that was the farthest you could shoot at this range) and took 3 more shots. It was about an 1 1/2" group but it was 6" high :dunno: My buddy, who also shoots the 7 RUM happened to call right then and I was telling him about shooting at the 225 yrd range and was about to tell him where my gun was hitting and he finished my sentence..."it's hitting 6" high". His gun apparrently did the same thing. I've looked at a couple different ballistic charts and none of them have shown a 3" spike between 100 yrds and 225 yrds. I know i could dial it down some but I will be hunting with 160 gr Partitions this year (I found 8 boxes of shells @ $30.00 a box and my gun loves them) so I don't want to be playing with my scope a week before the season. Just wondered if you have seen anything similar to this? |
| Intruder:
I'd recommend shooting the heavy bullet w/ the better BC too. Take advantage of the 100 grns of powder capacity :) |
| bobcat:
Blacktail, That sounds about right. With the high velocity, and being 3 inches high at 100 yards, the bullet will still be rising in relation to your line of sight, and 200 yards will be about the highest point in the trajectory. With that load you'd want to move it down a bit so it's only around 2 inches high at 100 yards. Take a look at this ballistic calculator: http://www.biggameinfo.com/index.aspx?page=/balcalc.ascx I just estimated the numbers, but it should be pretty close. |
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