.22LR SK High Velocity Match

Feisar

Struggling to see what purpose this serves, it's still going to drift more than standard match ammo in the wind so what's the point?

https://sk-ammunition.com/products/high-velocity-match/

JP22

Feisar wrote: »

Struggling to see what purpose this serves, it's still going to drift more than standard match ammo in the wind so what's the point?

https://sk-ammunition.com/products/high-velocity-match/

True.

Only reason that comes to mind is "Silhouette Steel Plate" shooting which is common in US.

Some targets are made of heavy plate material and may need some extra power to knock them over.

JMTW - just my tuppence worth.

Feisar

I still can't wrap my head around high velocity drifting more than subs!...

JP22

Feisar wrote: »

I still can't wrap my head around high velocity drifting more than subs!...

True.

Maybe the drift is so small at shorter distances its of no concern on tgts like plates.

We all know HV is useless for BR50 work.

Uinseann_16

And that 1263fps is out of a 26" test barrel surely it would be subsonic out if a 18" barrel ?
Although he's getting close to advertised out of that bergara with a shorter barrel

Feisar

Uinseann_16 wrote: »

And that 1263fps is out of a 26" test barrel surely it would be subsonic out if a 18" barrel ?
Although he's getting close to advertised out of that bergara with a shorter barrel

Doesn’t a 22LR max out velocity at about 14 inches?

Uinseann_16

Feisar wrote: »

Doesn’t a 22LR max out velocity at about 14 inches?

I think you can get a lil extra out of certain ammo , like in the description of this ammo it's got a new type of powder ?
That's why I was guessing it may have got Less out of a shorter barrel hence using a 26" barrel for tests to look better

extremetaz

Feisar wrote: »

Doesn’t a 22LR max out velocity at about 14 inches?

Yes. Everything after that is basically sight radius and velocity loss - with the latter being quite important in the case of standard or subsonic ammo as it can easily be right on the line in shorter barrels.

Feisar wrote: »

I still can't wrap my head around high velocity drifting more than subs!...

'Drift' probably isn't the right word as it suggests that it's wind that causes the issue - all other things being equal, less time in the wind means less drift (That being said, HV's are generally lighter pills and Stingers are a full 20% lighter than standards or subs).

There are other factors though, and as long as the round stays supersonic, and well clear of the transonic region, you'll struggle to see any difference. It's as it comes back down through the sound barrier that things get weird. The other thing then is that if you take velocity variance in percentage terms off of the advertised value, then for the same notional 'precision', you can get a significantly greater range of velocities which, again, at longer ranges, leads to more uncertainty.

As for HV 'Match' ammo, that's the first time I've seen it and the only reason I can think of for it would be, as JP22 says, Silhouette and other than that then, maybe for pistols or very short barreled rifles.

Uinseann_16

I would've said they'd be useful for pistols to help cycling less stove pipes etc
But the website says specifically for NRL22 so they're going after that sector so PRS style shooting
But really a 42gr or 40gr subsonic would be much better for long range (100m+) as you don't have to worry about the transonic period which can destabilise a 22 very easily

Feisar

extremetaz wrote: »

Yes. Everything after that is basically sight radius and velocity loss - with the latter being quite important in the case of standard or subsonic ammo as it can easily be right on the line in shorter barrels.



'Drift' probably isn't the right word as it suggests that it's wind that causes the issue - all other things being equal, less time in the wind means less drift (That being said, HV's are generally lighter pills and Stingers are a full 20% lighter than standards or subs).

There are other factors though, and as long as the round stays supersonic, and well clear of the transonic region, you'll struggle to see any difference. It's as it comes back down through the sound barrier that things get weird. The other thing then is that if you take velocity variance in percentage terms off of the advertised value, then for the same notional 'precision', you can get a significantly greater range of velocities which, again, at longer ranges, leads to more uncertainty.

As for HV 'Match' ammo, that's the first time I've seen it and the only reason I can think of for it would be, as JP22 says, Silhouette and other than that then, maybe for pistols or very short barreled rifles.

In Strelock Pro I ran a calc on RWS R50, 5 inch wind drift at 10mph, Upped the velocity to 1400 and the wind drift became 6!
That was using RA4 calcs and also I take your point wind drift is probably the wrong word, lateral drift being more accurate.

Feisar

Uinseann_16 wrote: »

I would've said they'd be useful for pistols to help cycling less stove pipes etc
But the website says specifically for NRL22 so they're going after that sector so PRS style shooting
But really a 42gr or 40gr subsonic would be much better for long range (100m+) as you don't have to worry about the transonic period which can destabilise a 22 very easily

This was my thinking on it as well.

Vegeta

This video shows why there is a potential market for fast 22lr ammo:

https://www.youtube.com/watch?v=SK_neEXC1Pw

clivej

Vegeta wrote: »

This video shows why there is a potential market for fast 22lr ammo:

https://www.youtube.com/watch?v=SK_neEXC1Pw

A very informative video. A good find.

GooseB

For your entertainment if nothing else - Some velocity/barrel length comparisons:

Then some commentry from this guy not regarding muzzle velocity but on consistency:

And a review of the SH HV Match ammo:

clivej

https://www.youtube.com/watch?v=dvnB-suakF8

JP22

Bit long winded, but bear with me.

As always, vast amounts of info/reviews out there on various types of .22RF ammo. A small few are posted by dedicated experienced pros, most are posted by you/me, joe public. Don’t believe all the hype posted by manufactures, they have investors/bean counters/banks/etc. to keep happy.

All various types of .22RF have their “own place in the game” BUT what is the game?.

Basically, it depends on the shooting discipline you participate in and the accuracy required for that particular discipline.

.22RF is an arcane science, its maddening/frustrating and additive as hell, shooters have spent years and years trying to figure it out, yet few have totally mastered its complexity. CF/FB regardless of weights/velocities/ranges is said to be such simpler to understand and master.

Any quality .22RF ammo which groups at half inch or less at 50 yds and one inch or less at 100 yds is super happy days; beware - small vermin/club sporting targets are in big trouble.

Move up the ladder to Benchrest BR50 targets or equivalent and you’re into a whole new ball game now. At this level it’s not just the gear/ammo/setup you have and whether it’s accurate or not, at this level CONSISTENCY is everything.

On BR50 targets or equivalent (heavy class/<15lbs) quarter inch (0.25+) ammo is just not good enough, you’re up against Match 54’s and similar plus custom builds.

Sure, any rifle/ammo setup can hit 5/6 ten’s in a row, maybe more on a good day, BUT will it do 25 tens in a row and MORE importantly will it do 25 tens consistently?, this month/next month.......

.22RF SV for 50/100yd shooting is by far more accurate than HV, just look up any Olympic shooting records.

JMTW, keep safe.

extremetaz

Feisar wrote: »

In Strelock Pro I ran a calc on RWS R50, 5 inch wind drift at 10mph, Upped the velocity to 1400 and the wind drift became 6!
That was using RA4 calcs and also I take your point wind drift is probably the wrong word, lateral drift being more accurate.

That is interesting.

Realistically, if you didn't change the bullet weight then the default twist rate would likely be off at that velocity, but that's not something I'd expect Strelock to be able to account for.

edit: Just watched the Mark&Sam vid and those velocitors are pretty much exactly what you outline above so twist rate clearly not a factor after all.