Thread: Hornady 55gr SP 223 REM Training Chronograph Results

I had the opportunity to put Hornady 55gr SP 223 REM Training through a chronograph today thanks to Spudattack.

These are the results
3178
3120
3114
3124
3119
3128
3144
3174
3175
3184
3181
3171
Average 3151.

This is the last three rounds tested grouped at 100m

ps: i had already posted this but it seems to have disappeared so sorry if this is a double up.

What barrel length?

Sorry.
Shot through a ruger American all weather ss with 22" barrel 1:8 twist

Sent from my workbench

reasonably big ES, doesn’t affect accuracy tho.......

Originally Posted by greghud

reasonably big ES, doesn’t affect accuracy tho.......

ES?

Sent from my workbench

extreme spread, the fastest and slowest chronographed speeds.
it can indicate variances in powder charge or other inconstancies in the loaded rounds.
often accurate ammo has a small ES.
greg

i thought it may have been something like that.

Slowest (3114) is 70fps slower than the fastest (3184) so the difference is 70fps which is 2.2% less. 3114 is 1.2% less than the average 3151, as a percentage how does that fit with acceptable tolerances? Keeping in mind the slowest is 37fps slower than the average and we are talking about a 3,151fps average.

That training brass is good stuff. Use it to reload now but out of the box it's pretty good bang for buck. Haven't tried the steel "Match" stuff but know they were selling it on NZAR15.

@logesearle

Sent from my workbench

Originally Posted by smidey

I had the opportunity to put Hornady 55gr SP 223 REM Training through a chronograph today thanks to Spudattack.

These are the results
3178
3120
3114
3124
3119
3128
3144
3174
3175
3184
3181
3171
Average 3151.

This is the last three rounds tested grouped at 100m

ps: i had already posted this but it seems to have disappeared so sorry if this is a double up.

gee I hope at that price that's for 50rds if not you KIWIS pay a shitload for ammo

Originally Posted by smidey

i thought it may have been something like that.

Slowest (3114) is 70fps slower than the fastest (3184) so the difference is 70fps which is 2.2% less. 3114 is 1.2% less than the average 3151, as a percentage how does that fit with acceptable tolerances? Keeping in mind the slowest is 37fps slower than the average and we are talking about a 3,151fps average.

this is a good es shot out of my 260R with 130g VLD BURGERS but they shot shit so I went with a different load

Thanks @smidey .
I have a 1:12 twist 22" barrel, would they slightly faster with a slower twist?

Originally Posted by logesearle

Thanks @smidey .
I have a 1:12 twist 22" barrel, would they slightly faster with a slower twist?

I don't know, i guess slightly faster but that is just that, a guess

ok there is ES loads out there . . but is accuracy good enough for what you want to achieve.

Yup a low ES doesn't always mean accurate. A bad ES of say 100 fps can still shoot very tight groups up to 200-300.

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