Thread: .243 load development part deux

Originally Posted by Zedrex

Would I be right in thinking the 2213 is slower burning?


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https://www.adiworldclass.com.au/powder-equivalents/

Originally Posted by Zedrex

Hushpower 300 over barrel

Wild test but maybe shoot a group without the can. I had a can I won't name (it was replaced quick smart) that turned 2 different rifles into 3 plus inch guns from closer to a inch. Unlikely that's the case since factory is ok (have we actually seen an deer season groups?) but its possible.

Originally Posted by Zedrex

Hushpower 300 over barrel

Shoot the rifle ( 5shot group) without the suppressor rear bush and/or without the suppressor attached. Do this before you shoot anymore reloads that you will be checking the precision of. Also look very closely at the muzzle crown and the last 5mm of the muzzle for any roughness or pitting etc. If you take a closeup pic i can look at it for you to help.

Originally Posted by Stocky

Wild test but maybe shoot a group without the can. I had a can I won't name (it was replaced quick smart) that turned 2 different rifles into 3 plus inch guns from closer to a inch. Unlikely that's the case since factory is ok (have we actually seen an deer season groups?) but its possible.

All the groups bar one shown on here are poor to very poor. This is why im asking about the suppressor, trying to possibly eliminate a cause.

Originally Posted by Stocky

Wild test but maybe shoot a group without the can. I had a can I won't name (it was replaced quick smart) that turned 2 different rifles into 3 plus inch guns from closer to a inch. Unlikely that's the case since factory is ok (have we actually seen an deer season groups?) but its possible.

I'm not sure if we can go unsuppressed at the range but if we can, that seems like a good "control" group. The DS was the second tightest group it shot a 3RD group 1.42 MOA mean radius of 1.88cm v's the SST 42g which shot 5RD at 0.71 MOA mean radius 0.89cm

Originally Posted by Roarless20

Shoot the rifle ( 5shot group) without the suppressor rear bush and/or without the suppressor attached. Do this before you shoot anymore reloads that you will be checking the precision of. Also look very closely at the muzzle crown and the last 5mm of the muzzle for any roughness or pitting etc. If you take a closeup pic i can look at it for you to help.

Cheers man, how would you lie that picture orientated, angle to muzzle?

Originally Posted by longshot

https://www.adiworldclass.com.au/powder-equivalents/

Awesome, thanks for adding to my growing library of reference bookmarks

Hang on a minute. 1.42" is lots bigger than1.88cm and .71" sure as shit isn't under a cm either.

@Zedrex, do you shoot left handed or right handed?


Apart from the 43gr, all of those group sizes could be shrunk by around 50% by moving one or two holes to the right. In other words the outliers tend to be way out left.

With the information at hand, it is hard to make a definative call, but I would be looking first of all at bipod placement (hard surface?)
And at bipod loading.
Was the bipod jumping and needing repositioning at all?

It would also be prudent to try shooting off a front bag rather than a bipod.

Originally Posted by Zedrex

Cheers man, how would you lie that picture orientated, angle to muzzle?

Yep, take a couple but as long as they look to one side of the bore clearly. Take 3 showing about 1/3rd area of the muzzle with each one.

Originally Posted by Micky Duck

Hang on a minute. 1.42" is lots bigger than1.88cm and .71" sure as shit isn't under a cm either.

Mean radius mate. Thats not group size its the average distance of each shot from the average point of impact. It's a better metric as it considers all shots and can be used similar to SD to predict. 3 shots still doesn't make it over useful but its a metric.

Originally Posted by Micky Duck

Hang on a minute. 1.42" is lots bigger than1.88cm and .71" sure as shit isn't under a cm either.

I've just started playing with the Hornady app, so it's possible I've stuffed up the inputs, spose I should RTFM!

Originally Posted by longshot

@Zedrex, do you shoot left handed or right handed?


Apart from the 43gr, all of those group sizes could be shrunk by around 50% by moving one or two holes to the right. In other words the outliers tend to be way out left.

With the information at hand, it is hard to make a definative call, but I would be looking first of all at bipod placement (hard surface?)
And at bipod loading.
Was the bipod jumping and needing repositioning at all?

It would also be prudent to try shooting off a front bag rather than a bipod.

Right handed, Bipod on bench with legs against front upstand, stock on rear bag, no jumping around, bipod position was consistent, why use a front bag? I shoot off either the bipod or offhand so to my mind I should be recreating my hunting variables to test the load as those variables will be present when I'm using the rifle as it was intended.....but I'm all ears!

Originally Posted by Roarless20

Yep, take a couple but as long as they look to one side of the bore clearly. Take 3 showing about 1/3rd area of the muzzle with each one.

Here you go

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14 pages of WTF, 87gr Vmax, 90gr BT, 103 ELDX go home sunshine, SST's are still shit