frontier gander

Found a great place to do 175 and 200 yard shooting. I set my target out there and marked the 175yrd spot and set up my stuff and shot off of my shooting sticks. 2 shots was more than enough to know that the big 405 Powerbelt is dropping pretty good at that distance and the 80 grain charge i use.
They grouped excellent. Right at 2 1/2" @ 175 and using shooting sticks!

I plan on trying 2 more shots at 175 with winchester 777 primers tomorrow. Today i was using remington kleanbores.

Drop, #1 shot was exactly at 13" low @ 175yrd.

POA was the 6 o'clock spot on the small circle. (big circle is for 100 yard Mountain rifle shooting)






So now my question. 3 clicks up to move it up 4" or leave it where its at? An elk has a huge side so 13" may seem like a lot but when the elk is in your scope, 13" to be is doable.

4" high @ 100 puts me 4" high at 50 and 75 yards. Its weird how that works out but its right on the money at the shorter ranges.

burntmuch

Thats some good shooting. Id leave it right there. I would think you,d be able to hold it right on the elks back, that would drop it right into the vitals.

frontier gander

exactly what i was thinking.

200yards would be if i were hunting big open fields but my area is a small field thats boardered by pines.

I'll try 200 yards tomorrow.

Underclocked

Leave it where it is and get ready for substantially more drop - use a taller target.

frontier gander

I'll switch to the 777 primer and see how it does with that one. I should be able to squeeze off 2" from the 13" drop that i have with the kleanbore primers.

gleason.chapman

http://www.powerbeltbullets.com/docs/PBB28inchballistics.pdf has this for thedrop with 150 yard zero using 100g of 777, you were using 80:

If you know the MV of your load we can drop it into here:
http://www.sav10ml.com/pages/load_data/traj_basic_dat.html

According to this chart you with 100g of 77 you need to be 5 1/4 inches high at 75 yards to get the drop in this chart. I am gonna say with 80g you bullethas the drop of 200 yards at the 175 yard point. So according to the chart you should have been-11.5 inches low at 175, which was about what you were.Anyway if you have a chrony get the ML and we can figure it outpretty close, range tests like your doing it the best. shoot 3 shots.
Chap

Rifle Loony

If a couple of inches of drop is a concern, why only 80 grain charges?

More propellant, less drop..............

cayugad

Chap - I would suspect that a 405 grain bullet with only 80 grains of powder might not make that kind of velocity. This is very interesting seeing these kind of results.

sabotloader

cayugad

I shoot 90 grains of T7-3f pushing a 460 grain BS and the results that FG got @ a 175 yards are pretty much the charted results if the gun is zeroed @ 100.

Here is a Barnes chart for that load load.

frontier gander

Recoil, It gets uncomfortable for me with those big bullets with 90+ grains. If i had open sights it would be a little better as i would not have to worry about the rifle getting away and the scope hitting me in the face