I used a free ballistic trajectory program called www.eskimo.com. I plugged in all the information. I am shooting a .300RUM with a 165grain ballistic tip bullet and 100gr of RL25 in a 31" barrel. I sight the rifle in at 100 yards and it is dead on, a 3 shot group making one ragged hole. After cleaning the barrel I look at the trajectory program and it says to adjust 9 clicks (1/4 moa) for 300 yards. I shoot a group measuring 1.5" off the mirror of my truck. However the group is about 2 inches to the right and about 4 inches high. I can see it being to the right becuase of a slight wind but I dont see why it is so high. So I back off to 350 yards and adjust the scope a total of 12 clicks. The same exact thing happens only with the group measuring 1.75". Why is it that I am hitting so high. Please give your opinions. I plugged in 3600fps I cannot imagine it being that much higher.
Help me with my trajectory
- Thread starter Smoak
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- Oct 30, 2004
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Hence the saying...There is no substitute for real field time. PC's are a good guide but that is it. Just a guide.
- Thread starter
- #4
- Oct 30, 2004
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I will run quickload for you tonite. We will see an estimate of pressure and velocity.
remingtonman_25_06
Handloader
- Nov 17, 2005
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Yah, but hes using a 31" tube. 3500fps is easily doable in a 26" so with 5" more barrel, doesn't sound to bad.
- Oct 30, 2004
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Smoak":3ax56fxm said:
e-mail me so I remember to run it. if you're interested.
- Oct 30, 2004
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remingtonman_25_06":3td6xzv6 said:
I got 3500-3600 fps but with the 150's in a 26" tube.
In a 31" 3600 with a 165 does not sound out of realm.
remingtonman_25_06
Handloader
- Nov 17, 2005
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Yah I'm just saying, I got 3650fps with the 150g btips out of my 26" tube, so 3600fps w/165g with 5" more barrel is hardly out of wack. THose longer barrels really really help on cases like the RUM's. Cheap velocity!
- Thread starter
- #11
- Oct 30, 2004
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As Soon as I get home buddy. I promise.
- Oct 30, 2004
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Oh! I totally agree! I am thinking of putting a 28-30" on my 30-378 when it "passes on". I am realizing 3330 fps with a factory 26" 110 gr Retumbo and the 200 gr AccuBond. With a 30" I am thinking 3450 or so!remingtonman_25_06":p3zjah6g said:
remingtonman_25_06
Handloader
- Nov 17, 2005
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Yah, that would be awesome POP. 30" barrel and shooting the 200g AB in the 300 RUM would give almost 3400fps. That 30-378 weatherby should do that as well. Talk about a long range thumper!!
- Oct 30, 2004
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Smoak":encp522j said:
OK quickload predicts
3647 fps and 74000k psi... :shock:
- Thread starter
- #16
- Oct 30, 2004
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Like I said buddy it is a prediction but so far 98% of all my quickload recipes have been 'spot on" at the range.
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