22BR and 4350

[xswanted]

Anyone have any data and or results with either H4350 or IMR 4350 in the 22BR and 75-80gr bullets?

Just started some load development today and want to know if anyone has had luck with this combo.

Thanks

 

[Phil]

I believe James Phillips can assist you with this.........

 

[xswanted]

I believe James Phillips can assist you with this.........

Is he a member here?

 

[Phil]

Yes sir he is......

 

[Baka]

I believe James Phillips can assist you with this.........

I hope he chimes in because I'm interested also in this.

 

[stretch257]

I am running 34.3 gr. Of h4350 behind 75amax. With Cci. 450 primers. I believe the velocity was around 3200.

 

[USMCDOC]

I used to use 90VLD's and 32.7 grs of H4350, but for me, even better was RL17.. 30.0 grs of Varget with the 75 gr Amax.. That is the powder i think that you should be looking at for bullets from 80 grs and less in the 22BR

 

[RGRobinett]

DITTO - USMCDOC's Rl-17, per above. I've been getting very good precision (grouping) AND 'crazy' (unexpectedly high) velocity via .22BR, with my 73-81 Gr. bullets - & at sane working pressure: easy extraction, and excellent case life. RG

 

[Phil]

What kinds of speed were you guy`s getting with the 75 amax and R-17?????

 

[USMCDOC]

What kinds of speed were you guy`s getting with the 75 amax and R-17?????

I didn't use RL17 with the Amax.. but with Varget, it was somewhere around 3100 if i remember correctly,. But the 90's with RL17, Mv was just a tad over 3200 fps

 

[xswanted]

Thanks guys.

I've ran both Varget and 8208 in this gun. 8208 works better than Varget however I'm looking to go to a slower powder. It seems to work well in my Dasher and I'm hoping the same can be said about the 22BR.

 

[xswanted]

DITTO - USMCDOC's Rl-17, per above. I've been getting very good precision (grouping) AND 'crazy' (unexpectedly high) velocity via .22BR, with my 73-81 Gr. bullets - & at sane working pressure: easy extraction, and excellent case life. RG

Do you have a possible starting load for R17 and the 75 class bullets?

Thank you

 

[USMCDOC]

Do you have a possible starting load for R17 and the 75 class bullets?

Thank you

My feeble mind wants to say "look at 31.0 grs", but i am not an expert by no means and i have a trend to want to SWAG things!

 

[ASbobcat]

Do you have a possible starting load for R17 and the 75 class bullets?

Thank you

Funny you should ask. I just loaded a .2gr ladder with RL17 behind Hornady 75gr BTHPM to chrono tomorrow. As per USMCDOC, I am starting just above 31gr just because data is so scarce. But I fully expect to find a max load considerably above that. RL17 has produced excellent results for me in my 6BR, so I am optimistic.
I will post the results when I get home.

 

[xswanted]

Thanks guys!

 

[USMCDOC]

Funny you should ask. I just loaded a .2gr ladder with RL17 behind Hornady 75gr BTHPM to chrono tomorrow. As per USMCDOC, I am starting just above 31gr just because data is so scarce. But I fully expect to find a max load considerably above that. RL17 has produced excellent results for me in my 6BR, so I am optimistic.
I will post the results when I get home.

Looking forward to seeing what you come up with there

 

[RGRobinett]

Do you have a possible starting load for R17 and the 75 class bullets?

Thank you

There is little charted ground for RL-17 - I call it gross delinquency by Alliant ,or, at least, missing a great marketing opportunity! Maybe they don't want everything else to look obsolete. In applications where it works, I've found RL-17 to be, "in a class by it's self."

Based upon experimentation, with my 73 Gr. BT bullets, I will not disagree with USMCDOC's, "look at 31.0Gr.", from above, for a starting point, However, I'd tend to err on the shorter side - 30.0 Gr. and work up, until they, "go in a hole" (and you can expect that), or, looking for all it has, until pressure dictates stopping. Sticky bolt-lift and ejector plunger-hole marks are over the top: be careful. Good shootin'! RG

 

[ASbobcat]

The following results are presented subject to the usual caveat, "These loads may not be safe in YOUR gun, blah blah blah......".

28in Brux 4 groove, 1:8 twist, .250NK. Blue box Lapua brass with at least 8 prior loadings. 75gr Hornady BTHPM, RL-17, CCI 450. Temp 75deg

31.6gr 2980fps
35.0gr 3420fps

All primers were still tight as new (.1710). No sticky bolt lift. No ejector swipes. Primer cratering began at 34.8gr, but I consider this an unreliable pressure indication with an original factory Savage bolt head due to a relatively large firing pin hole.

31.6gr turned out to be VERY conservative, as velocity increments were initially sporadic. I have experienced this with RL15 and RL17 and I suspect it is due to incomplete combustion as a result of low chamber pressure. Above 33.5gr, velocity increments began to show more regularity and became very predictable approaching 35.0gr., averaging about 15fps/0.1gr.
35.0gr of RL 17 is a heavily compressed load in the 22BR, with the powder just below the case lip prior to bullet seating.

In conclusion, I consider 35.0gr to be a practical limit IN MY GUN. Partly because of primer cratering, but mostly because I just couldn't get any more powder in the case. RL17 appears to be an optimum propellant in the 22BR for bullets from 75-90gr.

I agree with RGRobinet's assessment of RL17. In my experience with 6BR and 6.5x47Lapua it is in a class by itself. In my most recent match at 300M with gusting tailwinds, both of these averaged 0.13 moa vertical spread with "hot" loads. I have found nothing else that can even come close to velocities attainable with RL17 in these two cartridges. And now I can add a third to the list.

 

[USMCDOC]

The following results are presented subject to the usual caveat, "These loads may not be safe in YOUR gun, blah blah blah......".

28in Brux 4 groove, 1:8 twist, .250NK. Blue box Lapua brass with at least 8 prior loadings. 75gr Hornady BTHPM, RL-17, CCI 450

31.6gr 2980fps
35.0gr 3420fps

All primers were still tight as new (.1710). No sticky bolt lift. No ejector swipes. Primer cratering began at 34.8gr, but I consider this an unreliable pressure indication with an original factory Savage bolt head due to a relatively large firing pin hole.

31.6gr turned out to be VERY conservative, as velocity increments were initially sporadic. I have experienced this with RL15 and RL17 and I suspect it is due to incomplete combustion as a result of low chamber pressure. Above 33.5gr, velocity increments began to show more regularity and became very predictable approaching 35.0gr., averaging about 15fps/0.1gr.
35.0gr of RL 17 is a heavily compressed load in the 22BR, with the powder just below the case lip prior to bullet seating.

In conclusion, I consider 35.0gr to be a practical limit IN MY GUN. Partly because of primer cratering, but mostly because I just couldn't get any more powder in the case. RL17 appears to be an optimum propellant in the 22BR for bullets from 75-90gr.

I am seriously thinking of moving from a small "bore" palma gun to just shooting an Any/any gun.. hence, i may move back to doing a 22 something or other..

 

[ASbobcat]

I am seriously thinking of moving from a small "bore" palma gun to just shooting an Any/any gun.. hence, i may move back to doing a 22 something or other..

I am sold on the 22BR for pure fun. I was not trying to assess accuracy during my ladder test, but I noticed that the bullets (inexpensive 15cent Hornadys) just kept going through the same hole at 100yards, with an expected periodic vertical adjustment for increasing velocity. And this was from a bi-pod. I also like the fact that I can shoot it free-recoil.
It would make a fantastic PD caliber, but I won't use it for competitive target shooting until I can afford a more powerful scope. I lost that 300M match because I couldn't see my 6mm holes to make hold-off adjustments. You would have to borrow Mt Palomar to see .224 holes at 600yards.