284 win build w 195 berger

[scottyd2506]

My buddy couldn't get better than .75" at 100 yards with the 195's in his STW but just shot under 3" at 600 yards so I think the big bullets need longer to stabilize.

I have seen and heard many facts of loads that say shoot 1 moa at 100 yards, yet will print 4 inches at 600 avg.

Even though the 180's shoot better out of my gun for now. I'm more focused on the 195's, the .755 BC is hard to beat. Even the New Sierra 183 w a avg BC of .703 is not a bad bullet, but it's only 12 grains less weight and it's not like your going to gain 200 fps with only 12 grains less, not going to make up the massive 53 BC difference (.755 vs .703) and only get 100-120 fps more speed if that.
I still am going to test the 183's.
I'm new to the world of 7mm, have 3 x 30 cals (308 AR, 300 WM bolt and SKS) a 25-06, 204, 223 etc. It's unreal how the 7mm bullets just are so great, even the lowly 140's have over .5 BC, 168's over .6 BC.

I'm impressed with the 284 and so is my friend
2700 fps w the 195's and still has 560 ft lbs of energy at a mile away-- like a .45 acp at muzzle. out of a non magnum case to boot.

 

[Stgraves260]

Thank you very much for the input!!!

 

[scottyd2506]

stretched the legs on the 284 a bit last week, took it out to one of my spots out in the fields, the winds was 8 avg gusting to 17 on a 360 deg with 360 N and 180 south- winds coming from 300 to 310 deg or so I set up shooting SE about 135 deg
I set up at 600 yards.. any further and i'd had to go N-S 260-180 and fight a 10 mph wind from just less than 45 deg angle.. at 600 I had maybe a 5-10 deg wind at my back.. Got off a 3 shot group at 2.55 inch. Scope clicks was off some, said 44.3 on paper, but only needed 43.

Tried another group, 2 shots less than a inch from another, but the 3nd the wind picked up..
So it was 3.10 inches.. the wind even at my back & off a few deg is enough to throw shots off 3-4 inches. But even so the 195 did well out to the 600 mark.. around 1/2 MOA poor water jug didn't evade the 195t at 600 yards.

Going to try 1000 soon, winds are still blowing, so prob no groups, might check for a vertical group. To so where my elevation is at 1000.

 

[Stgraves260]

Good mornin. Have you tried Retumbo powder? H4350 would be good too. The 4350 would give up some speed though, but more accurate. If it's a huntin rifle your buildin than 1 moa is perfect. The rifle I shot in the army was 1moa accurate. The other marksmen on my unit could shoot 5 shot same hole all day long but we still called them 1 moa rifles. Most of the rifles I see built claim gun)1/2 and sometimes.25 moa rifles. But when we go shoot they are lucky if they are 2 moa rifles. All these rifles I see that hold under a 3" group at 1000yrds with 10 rounds are not Huntin rifles. They are bench rifles that weight around 100lbs. They don't even pull the trigger themselves. They hook up some device that squeezes the trigger for them when they push a button. To each there own I say. If I do my part and wind conditions are right I can usually hit a 10" target pretty consistent. My best group was a 5 shot group. I had 3 bullets that were less than 1" apart but the other 2 opened up. It was about a 4.5" group from a huntin rifle.

 

[scottyd2506]

Went out a few weeks ago to 1000 yards.. We sat up facing north, so I dialsed in 4 clicks 6.7 in for wind drift and 2.5 in for rotational drift.. around 9 to 9.5 inches total.. not counting wind..
It has been VERY windy here, but it ws around 9am and we have a 1-2 mph wind at around 7:30 behind us. The 195's are going 2710-2725 fps with my old loads.
(I know loaded em to 2650 with 1.5 grains less powder to ease up on the brass)
Back to the 1000 yards.. Shot a couple of 180's I didn't have sighted in just for kicks and to foul barrel.. both missed. Then to the 195 I had sighted in at 200 yards..104 clicks.. held about 3 inches foe 1-2 mph from 7:30 behind me.. Squeezed the trigger.... The lovely sound of "ting on the square 16 inch A500 steel,
Then another and another and another.. so easy.. Then the wind picked up 5-6-7-8 mph from 8:00 and the wind was shifting from 9 to 7:00 quick and also the speed from 4 mph to 10 back n forth.. So now I wasn't so cocky and a few misses,, The wind was kicking our buts, my friend brought his Rem 700 SPS 308 w a 20 in barrel shooting 175 SMK's at 2575 fps.. His gun is accurate for a stock barrel shots 1/2 inch to 0.65 all day at 100. Noticed when his hot it made a ting sound and could not see the steel move, but when the 195's hit it, the steel moves bigtime back n forth
Those 195's sure keep the energy.

We sat Gallon water jugs at 1000 yards.. We shot at them for 10 shots each.. not of us hit them.. or so we thought, I found out I hit mine but just barely nicked it.
The wind was blowing as I sad heavy and all over the place for speed... So it was just pure luck I nicked it.. It could have been either one of us.

last few weeks we have has 25-27 mph winds all the time, jumping around.. We are waiting for the winds to calm before more testing.

 

[scottyd2506]

update.

I've had to load down the charge on my 195 loads, was 53.5, now 52.0. my velocity went from 2720 fps down to 2590-2600 fps. Not sure why, the 180's are mild loads w 55.0 H4831, but 190's w 53.5 are sticky bolt lift, killing my brass also.
Wind drift for the 195's are now like 5.7 inches per mph at 1000 yards, my 180's at 2830 fps are also 5.7 inches per mph at 1000 yards.

From my experience, the 195's will be 200-250 less fps per the same pressure. Most likely the extra bearing surface.

Most people will gain nothing going from the 180's to 195's , but for me so far, the 195's use less powder and help pro-long barrel life, also they are thinner jacket and can hunt with em.. out to a mile the 195 have close to 500 ft lbs, while the 180;s are close to 400 ft lbs
But those 180's, are so accurate, going to play with the Sierra 183's. anyone have any load data for them?

 

[Stgraves260]

Yeah that wind will kick your but. Man there are days I can't hit the side of a barn. gun)