AR load work up / 75 grainers - target pic 200 yards

crow sniper

crow sniper

New member
Loaded up some 75 grain PRVI bullets with varget to test in my bushmaster varminter last weekend.I started at 23 grains and went up to 25.2 with varget, OAL was mag length 2.265,winchester brass,CCI primers.
I do all my testing at 200 yards ,the ground was wet so i shot off the hood of my truck with a biopd and rear bag.The orange dots are 1/2" for reference,wind was blowing around 5 mph.Groups started to come together at 23.7-24.6 grains but my best group was my max load 25.2 grains,right at 1".My brass looked fine to me ,think my max load is too hot ?
I will run them over my chrony soon as i get a chance.
 
I'd try a more solid rest and run them. Maybe a little more powder in the case too. I usually find my load right at max or just over. Still looks pretty good for 200yds I'm gonna pick up a box of the 77gr sierras. They have some 500round packs for 125 at a local pawn shop
 
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Test is inconclusive due to shooting only 3 shot groups. No reliable conclusions can be drawn.

4 of the groups may well be more promising than your selected "best" group. It is not possible to tell due to the missing 4th and 5th shots that would have shown more conslusively if the outlier shot was bad shooting or poor accuracy.

The road to poor accuracy and frustration is paved with three shot groups. The worst idea in shooting.

Take the best 3-4 groups and shoot 5 shots X 2 groups of each. Then the truth shall be known and it shall set you free.


Grouse
 
Originally Posted By: The Famous GrouseTest is inconclusive due to shooting only 3 shot groups. No reliable conclusions can be drawn.

4 of the groups may well be more promising than your selected "best" group. It is not possible to tell due to the missing 4th and 5th shots that would have shown more conslusively if the outlier shot was bad shooting or poor accuracy.

The road to poor accuracy and frustration is paved with three shot groups. The worst idea in shooting.

Take the best 3-4 groups and shoot 5 shots X 2 groups of each. Then the truth shall be known and it shall set you free.


Grouse





Not to mention trying to shoot for groups at 200yrds. Too much room for human error. Ive personally never been able to shoot a consistant group over the hood either. Alwas seems to be the wrong height or very hard to get steady, it doesnt take much to wiggle the pickup just enough.

To each his own though and if you think you made good shots then pick your load and get to it. Only person you have to please is yourself.
 
I target shoot quite a bit off the hood of my truck and the results are the same as shooting prone for me,found plenty of good loads that way.Im not going for benchrest accuracy,just looking for a good plinking load ,this test shows me that.
 
I think anyone who can put 3 shot into an inch at a real 200, can plain shoot. Guys that can shoot 1/2" groups at 100 yards, doesn't mean they can shoot 1" at 200 - that's just theory.

I think that I would forget the lower powder charges and shoot either two 5 shot groups or just 10 shot groups with your top three powder charges. Remember, we are actually trying to kill something not just poke a hole in paper. I like hotter loads for proper bullet performance and it helps with range estimation errors in the field.

You look like you are headed down the right path, just keep at it. Also, it takes balls to really post your actual groups on a public forum. Many will criticize, but you are doing many things right to get to were you are.
 
Originally Posted By: Clay34I think anyone who can put 3 shot into an inch at a real 200, can plain shoot. Guys that can shoot 1/2" groups at 100 yards, doesn't mean they can shoot 1" at 200 - that's just theory.

I think that I would forget the lower powder charges and shoot either two 5 shot groups or just 10 shot groups with your top three powder charges. Remember, we are actually trying to kill something not just poke a hole in paper. I like hotter loads for proper bullet performance and it helps with range estimation errors in the field.

You look like you are headed down the right path, just keep at it. Also, it takes balls to really post your actual groups on a public forum. Many will criticize, but you are doing many things right to get to were you are.
I like the way you think
 
It appears that you are building your loads in .2gr increments...Due to the small case size, I would go back and build a minimum of 15 rounds, with five charged at 25.1, 25.2, and 25.3 grains to see if you are possibly missing that really good one...Also, it would give you a more definitive answer to your efforts...For my .223 and .204 test rounds, I always do it in .1gr increments...I build ten of each...five for the actual testing and the second five for verification of the first...
Any that don't provide good groups get torn down to save on components.

Shooting three round groups, especially with any wind, is really too iffy, especially at 200 yards..It doesn't take much to blow a round into, or out of, a group...If groups hold together at 100 yards, generally they will hold together at 200, but you never know until you prove that by stretching out your distance...I'm not challenging your shooting ability, but the basis you are using for determining your best group...

This is a 100 yard target I shot Sunday at a match with pretty breezy conditions.....223 with 55gr rounds..Lower right bull is a 'sighter' target..We were allowed one shot per bull..


This is a 200 yard target shot under the same conditions...
 
I get what you guys are saying but for the average joe looking for a plinking load this is as far as it goes with this ammo,prvi bullets are not really match grade and probally wont shoot bug holes.
I will eventually load up more test loads of the best looking groups to test at long range ,i save my targets for reference later on.
Im not too proud to post up my targets for you guys to check out ( thanks for yours oldturlte ) i've shot plenty of bad groups at 200 yards and some really nice ones too.
I shot the 25.2 varget load out to 600 yards with good results last weekend with 15 MOA of drop so velocity must be pretty good with this load.
 


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