270 trajectory

dead on · 06-07-2009, 08:30 AM

should i expect a 110 gr bullet to shoot flatter than a 130 gr bullet? some factory stuff i tried did not. i want to try reloading the sierra 110 bt. i have a tikka t3 that i just picked up after being lapped. i have plenty of imr4831,reloader 22 and some more that i cant remember right now. any sugestions would be appreciated. thank you.

Pete D. · 06-09-2009, 01:33 AM

Lemme run some data through a ballistics program and I'll get back to this. Be helpful to know the bullets used and the velocity for each.
What do the ballistics tables at the back of your reloading manuals tell you?
Pete

eldeguello · 06-09-2009, 04:59 AM

The lighter bullet will shoot flatter if it is going faster! But there is a point where the slower bullet will pass the faster one, since the faster one sheds velocity quicker too. So it depends on how far you are talking about.....

blaserman · 06-09-2009, 07:58 AM

Lets just say That compition Shooter use Heavy Bullets to shoot long Ranges. Less wing drift and the site in to the flatest posible way. I
would Go with the 130 gr.

stubblejumper · 06-09-2009, 05:26 PM

Quote:

should i expect a 110 gr bullet to shoot flatter than a 130 gr bullet? some factory stuff i tried did not.

How did you determine which load had the flatter trajectory?Did you just fire both loads at a given distance and assume that the one with the higher point of impact was shooting flatter?Or did you zero both loads at the same distance and then shoot them at longer distances to see which dropped more at those distances.

dead on · 06-10-2009, 02:27 PM

the 110 gr bullet printed 1.5 " higher than the 130 gr bullet so i added 1.5" to ae. measurement.Thank you sir

nchawkeye · 06-10-2009, 03:39 PM

http://www.federalpremium.com/products/compare/rifle_compare.aspx

Compare the 110gr Barnes and the 130gr Nosler Partition, they are both flat based bullets...This should give you a good idea...

dead on · 06-10-2009, 03:53 PM

NCHAWKEYE, thanks again sir great info

stubblejumper · 06-10-2009, 05:21 PM

Quote:

the 110 gr bullet printed 1.5 " higher than the 130 gr bullet so i added 1.5" to ae. measurement.Thank you sir

?????

bronko22000 · 06-11-2009, 11:08 AM

Hey Stubble - my thoughts exactly.
Dead on - Your logic on bullet trajectory is dead wrong.
If you were to plot your 2 bullets you would probably see that the lighter bullet crosses the line of sight at a farther distance from the bore than the heavier bullet and is continuing to climb at 100 yds.
(ie. with a 200 yd zero from the Hornady manual, a 100 gr .277" traveling at 3600 fps will be .40" high at 100 yds whereas a 130 gr bullet at 2900 fps will be about 1.14" high.) This is considering a 1.5" high line of sight above the bore.