TassieTiger wrote:^surely this is jest?
Anyways - spent a few hours testing again today. Unfortunately it came out bloody hot again and at one point, barrel became too hot to touch - which was not what I wanted at all but it had only shot 6 bullets after being cold, so caught me out.
So kept distance at 120m.
53.0gns of Ar2209 powder pushing 200gn ELDX.
Shot off a steel rest that lightly cradles fore end and stock, mounted to a table. Free to recoil.
Noticed a fair bit of vertical stringing - 2 and 3 inches on some loads.
Be keen to hear people’s opinions except for the outright obvious.
Was concentrating on bullet seat depth this time out - charge remained same.
Bill wrote:
I recently couldnt get some barnes TTSX to group better than 2 moa in my 6.5 grendel, seated 25 thou deeper and tried 2 slight lower charges, bingo found an accuracy node only 0.3gr under what was crap. It now puts 5 into 0.8moa
?
SCJ429 wrote:You will have to plot each shot on a pad of paper so you know what shot went where.
sungazer wrote:The distance and wobble is not in jest. Many very experienced balatisticians will advise that 140 yrds is the best distance to test your loads. I could give you references in Bryan litz book and others but cant be arsed.
SCJ429 wrote:A friend runs a shooting course at the range, only 10% of hunters can shoot the required one inch group at 100. They would not be using a 30-06, usually considerably smaller and easier to shoot.
bigfellascott wrote:You do know it's a hunting rifle not a target rifle? 30mm group would be fine for this rifles intended purpose.
sungazer wrote:I helped do some load development with a very skilled shooter on the weekend. We were using two chronos the Ohler a standard in the industry perfectly set up and a magneto speed. Turned out there was a pretty constant difference so either result was acceptable.
He shot quite a few loads 3 of each in 0.2 gn steps. He plotted the MV increase against load and had a linear line to a point say of 20fps per 0.2 grn then reached a point where the again linear line changed to 10 fps per 0.2 grn.
He is a excellent shooter however the groupings which were shot on individual target so the group and the horizontal step could be seen. Well the result was not a conclusive elevation against MV nor where the evident Nodes.
We have concluded it is about achieving the MV that you are after for that particular bullet there is a sweet spot in MV and BC. Then adjust seating depth to achieve a good group.
TassieTiger wrote:bigfellascott wrote:You do know it's a hunting rifle not a target rifle? 30mm group would be fine for this rifles intended purpose.
Yeah, I know...it’s also a lightweight hunting rifle, this part of my question is, is this acceptable...
I guess I’m wanting to meet manufacturers claims of 1 inch, 3 shot group at 100m and I want to be able to do that reliably.
It may well be that 200gn projectiles are not conducive to being Moa in this rifle...I get that...I’m just testing / seeking knowledge.
TassieTiger wrote:If you look at the 3rd photo - 83.60, that group measured 21mm. Good enough for deer and roo as long as it will be consistent.
The issue for me, especially early in, was the 3+ inch spreads from some of the other ammo - in particular some of the factory ammo that is 2-3mm shorter in length was spraying.
I’ve now fired 3 types of factory ammo through this rifle and cannot better 2.5 inch groupings. Hand loading - yes, i’m getting there...I will make it shoot darn the world!!!
Now, if you weren’t a hand loader and bought a brand new (yes - light weight, carry around sporting gun with fluted barrel) rifle for $1400 that was shooting 60-75mm groupings - would you be content? Serious question...
marksman wrote:TassieTiger wrote:If you look at the 3rd photo - 83.60, that group measured 21mm. Good enough for deer and roo as long as it will be consistent.
The issue for me, especially early in, was the 3+ inch spreads from some of the other ammo - in particular some of the factory ammo that is 2-3mm shorter in length was spraying.
I’ve now fired 3 types of factory ammo through this rifle and cannot better 2.5 inch groupings. Hand loading - yes, i’m getting there...I will make it shoot darn the world!!!
Now, if you weren’t a hand loader and bought a brand new (yes - light weight, carry around sporting gun with fluted barrel) rifle for $1400 that was shooting 60-75mm groupings - would you be content? Serious question...
no feckin way would I be happy
even at 30mm it would be gone back to be checked out and fixed
that rifle should be shooting 1/2 moa with factory ammo
the reason for the hunting accuracy proverb is the american hunters that can hit a bucket sized object with there 30-30 are only shooting at 50 yard distances and dont care enough if they spoil meat, having an accurate rifle is very important, 3 shots into a 10 cent piece at 100 is minimum for hunting
one ragged hole is better
TassieTiger wrote:If you look at the 3rd photo - 83.60, that group measured 21mm. Good enough for deer and roo as long as it will be consistent.
The issue for me, especially early in, was the 3+ inch spreads from some of the other ammo - in particular some of the factory ammo that is 2-3mm shorter in length was spraying.
I’ve now fired 3 types of factory ammo through this rifle and cannot better 2.5 inch groupings. Hand loading - yes, i’m getting there...I will make it shoot darn the world!!!
Now, if you weren’t a hand loader and bought a brand new (yes - light weight, carry around sporting gun with fluted barrel) rifle for $1400 that was shooting 60-75mm groupings - would you be content? Serious question...
marksman wrote:TassieTiger wrote:If you look at the 3rd photo - 83.60, that group measured 21mm. Good enough for deer and roo as long as it will be consistent.
The issue for me, especially early in, was the 3+ inch spreads from some of the other ammo - in particular some of the factory ammo that is 2-3mm shorter in length was spraying.
I’ve now fired 3 types of factory ammo through this rifle and cannot better 2.5 inch groupings. Hand loading - yes, i’m getting there...I will make it shoot darn the world!!!
Now, if you weren’t a hand loader and bought a brand new (yes - light weight, carry around sporting gun with fluted barrel) rifle for $1400 that was shooting 60-75mm groupings - would you be content? Serious question...
no feckin way would I be happy
even at 30mm it would be gone back to be checked out and fixed
that rifle should be shooting 1/2 moa with factory ammo
the reason for the hunting accuracy proverb is the american hunters that can hit a bucket sized object with there 30-30 are only shooting at 50 yard distances and dont care enough if they spoil meat, having an accurate rifle is very important, 3 shots into a 10 cent piece at 100 is minimum for hunting
one ragged hole is better