My Beeman R9

[Oldgringo]

Since I had already skipped church, I decided to also see what my self lube/tuned R9 was shooting.  I'd put in a JM kit and lubed her last spring and she had rested in the safe all summer.  The rifle has less than a tin of various pellets through her thus far.  I thought she preferred the H&N 8.64 gr. FTT with ragged one hole 25 yard accuracy.  The H&N FTT readings (with a couple of mulligans thrown in) were:

Avg.  877.1 fps
SD.      11.8
ES.      10.1

Hmmm?  I think I'll try some JSB 10.34 gr. Exacts for giggles, etc.  Again, with a couple of mulligans, the readings were: 

Avg.    790.9 fps
SD.         8.6
ES.         8.9

I believe the 10. 34 gr. JSB Exacts left a smaller hole than the H&N pellets and 791 fps muzzle velocity ain't too shabby for an older gentleman who does nothing but punch paper.

This brings up the question of what other more experienced shooters use as a 'git 'r done' pellet in their R9?

[39M]

Looks like you got your numbers mixed up on the 8.64.
Standard deviation? higher than the ES- extreme spread?

Or maybe I misinterpreted the initials.

[anuthabubba]

That's pretty dern good power from an R9!

[Oldgringo]

Looks like you got your numbers mixed up on the 8.64.
Standard deviation? higher than the ES- extreme spread?

Or maybe I misinterpreted the initials.

OOPS, you're right...   ES is 12.3

[Oldgringo]

That's pretty dern good power from an R9!

Maybe I cheated a little with the 'mulligans'?   

[anuthabubba]

My home tuned, JM kitted R10 shoots 10.5s at near 800fps. Placed a CPH into the brain of a nutria with it from 75 laser ranged yards, offhand, a few years ago. Checked my records and it was March, 2007.

[nced]

Since I had already skipped church, I decided to also see what my self lube/tuned R9 was shooting.  I'd put in a JM kit and lubed her last spring and she had rested in the safe all summer.  The rifle has less than a tin of various pellets through her thus far.  I thought she preferred the H&N 8.64 gr. FTT with ragged one hole 25 yard accuracy.  The H&N FTT readings (with a couple of mulligans thrown in) were:

Avg.  877.1 fps
SD.      11.8
ES.      10.1

Hmmm?  I think I'll try some JSB 10.34 gr. Exacts for giggles, etc.  Again, with a couple of mulligans, the readings were: 

Avg.    790.9 fps
SD.         8.6
ES.         8.9

I believe the 10. 34 gr. JSB Exacts left a smaller hole than the H&N pellets and 791 fps muzzle velocity ain't too shabby for an older gentleman who does nothing but punch paper.

This brings up the question of what other more experienced shooters use as a 'git 'r done' pellet in their R9?

When I first sold my .177 R9 to my brother the only pellet he shot was the 10.5 grain Crosman Premier from the 1250 count die lot marked box and with rather frequent shooting I would replace a good aftermarket spring (a Maccari Tarantula about 30 coils of .128 wire wound with a .540 ID) about every two years. After a few years he found that the flatter trajectory of the 7.9 grain Crosman Premier from the die lot matked 1250 count box trumped the better resistance to wind drift of the Heavy. After he switched to the 7.9 grain pellet the Tarantula replacement springs lasted twice as long in his .177 R9.

By the way...the 10.5 grain Premier was very accurate from his R9 as the scan of on old target shows...........

LOL.....those target was shot almost 15 years ago when my brother was still using a standard "powder burner 3 shot groups, bench rested "!

[wimpanzee]

After cleaning and re-lubing my vortek kit yesterday, I get 890fps with JSB 8.44's. Close to 800fps with JSB 10.3's, but a remarkable drop in power to 740fps with a brand new box f crosman premier heavies. I think they fit the bore too tight, and loose some power. All other pellets I've tried put out right around 15pe, but the crosmans were stuck at 13.9fpe. Sigh, $20 wasted...unless someone wanted to buy them...

[nced]

After cleaning and re-lubing my vortek kit yesterday, I get 890fps with JSB 8.44's. Close to 800fps with JSB 10.3's, but a remarkable drop in power to 740fps with a brand new box f crosman premier heavies. I think they fit the bore too tight, and loose some power. All other pellets I've tried put out right around 15pe, but the crosmans were stuck at 13.9fpe. Sigh, $20 wasted...unless someone wanted to buy them...

Hummmm..... it ain't all about "All other pellets I've tried put out right around 15pe" since only "fpe" at the target means anything! Lotta talk 'bout velocity, fpe, sd, bc, es (and other chrony related measurements), however, unless that 15fpe (or whatever) power can hit the target with sufficient accuracy it means little.

Personally, I find it hard to determine how accurate my R9 or HW95 is because I'm a inconsistent shooter at times and do all shooting from "bucket and sticks", however I find that it's easy to shoot a pellet over some chrony sensors, write down the numbers and revel in my "single diget velocity spreads" (or whatever). I remember years ago chronying some Beeman Bear Cub pellets (long ago!) and getting a deviation of only 3fps from my .177 R10 springer. Excited that I had found a relatively cheap dome pellet that shot with such consistent velocity I immediately did some short range accuracy testing upstairs in the WV house I used to live in. Guess what, the Bear Cubs were the MOST INACCURATE pellet I had ever shot up to that time giving 1/2" ctc groups at only 11 yards!

Anywhoo.......of the R9s I've owned over the years, the CPH has been one of the most accurate pellets from all. The only "down side" with shooting the heavier 10+ grain pellets for ME has been shortened spring life and a loopier trajectory.

[wimpanzee]

After cleaning and re-lubing my vortek kit yesterday, I get 890fps with JSB 8.44's. Close to 800fps with JSB 10.3's, but a remarkable drop in power to 740fps with a brand new box f crosman premier heavies. I think they fit the bore too tight, and loose some power. All other pellets I've tried put out right around 15pe, but the crosmans were stuck at 13.9fpe. Sigh, $20 wasted...unless someone wanted to buy them...

Hummmm..... it ain't all about "All other pellets I've tried put out right around 15pe" since only "fpe" at the target means anything! Lotta talk 'bout velocity, fpe, sd, bc, es (and other chrony related measurements), however, unless that 15fpe (or whatever) power can hit the target with sufficient accuracy it means little.

Personally, I find it hard to determine how accurate my R9 or HW95 is because I'm a inconsistent shooter at times and do all shooting from "bucket and sticks", however I find that it's easy to shoot a pellet over some chrony sensors, write down the numbers and revel in my "single diget velocity spreads" (or whatever). I remember years ago chronying some Beeman Bear Cub pellets (long ago!) and getting a deviation of only 3fps from my .177 R10 springer. Excited that I had found a relatively cheap dome pellet that shot with such consistent velocity I immediately did some short range accuracy testing upstairs in the WV house I used to live in. Guess what, the Bear Cubs were the MOST INACCURATE pellet I had ever shot up to that time giving 1/2" ctc groups at only 11 yards!

Anywhoo.......of the R9s I've owned over the years, the CPH has been one of the most accurate pellets from all. The only "down side" with shooting the heavier 10+ grain pellets for ME has been shortened spring life and a loopier trajectory.

The crosman premier heavies and my favorite jsb 8.44's seem to have the same accuracy for me - mostly 1 hole groups @25y, but I am far from perfect and put up half inch groups too. The jsb's seem more efficient, and the rifle has a smoother shot cycle with the JSB's. This accuracy is in spite the crosmans having an ES of around 30, and the JSB's in single digit spread.

[garczar6]

No JSB 8.4's?  Mine loves this pellet.

[Yak54]

My R9 is still in factory trim with no tune as of yet, and it seems to like the AA 8.4 and the FTT 8.64 best for accuracy.

[Oldgringo]

No JSB 8.4's?  Mine loves this pellet.

Good idea!  I'd go out and shoot a string of JSB 8.4's to be sure, if it wasn't so dadburned HOT.  I hate hot weather!

[Oldgringo]

No JSB 8.4's?  Mine loves this pellet.

Good idea!  I'd go out and shoot a string of JSB 8.4's to be sure, if it wasn't so dadburned HOT.  I hate hot weather!

Edit:

I just shot a 10 shot string of JSB 8.4 gr. Exact:

Avg.  882.1
SD       19.5
ES       15.3

Grouping was about the same as H&N FTT; ergo,   

[Yak54]

You might want to try the AA 8.4 pellet.  They seem to be more consistant than the JSB exact 8.44 for me.   

[Oldgringo]

You might want to try the AA 8.4 pellet.  They seem to be more consistant than the JSB exact 8.44 for me.   

[DanD]

Edit:

I just shot a 10 shot string of JSB 8.4 gr. Exact:

Avg.  882.1
SD       19.5
ES       15.3

Grouping was about the same as H&N FTT; ergo,   

How many shots in the strings? The ES and SD numbers look like there might be too few shots to get a good SD calculation.
Sorry, just saw "10."
Maybe needs to settle down some.

Mine likes FTT 4.50. CPL, maybe AA 4.51 but need more testing. It used to hate JSB 7.97, but I just sized the seal and dropped in a new hornet spring, and suddenly it seems to like them- maybe even love them.

[Yak54]

Greg---Just for your reference, here are my numbers with my factory stock R9 for 10 shot strings with the AA 8.4 and the JSB Exact pellets.

AA 8.4-----Average 872.6 fps
                 Std. Dev. 2.2
                 Spread  7 fps

JSB Exact 8.44-----Average 858 fps
                             Std. Dev. 2.0
                             Spread 6 fps

The AA 8.4 are consistently a snugger fit  than the JSB exact though !

[Oldgringo]

As said earlier, my home tuned, JM kitted R9 is nearly new with less than a tin through her.  After reading the above suggestions/comments, I shot some more 10 shot strings today WITHOUT any 'mulligans'.  The velocity results were as follows:

JSB 8.44 gr. Exacts      AA 8.4 gr, FD 4.51        AA 8.4 gr. FD 4.52          H&N 8.64 gr. FTT

Avg   870.9                                 876.1                      870.1                              861.5
SD      16.3                                     5.6                        14.3                                  7.4
ES      11.9                                      8.0                       10.2                                  6.5

To be honest, I don't know/care what Standard Deviation means.  The average FPS of these different pellets are not widely spread and seem to be in keeping with the R9 of others.  So, I reckon she is starting to settle in somewhat.  What I am quite pleased with is the ragged, 10 shot, 3/8" out to out, hole produced by the JSB's at 25 yards this morning.   

And then, it got too hot to stay outside on the patio.  C'mon cool and wet Fall weather.   

[39M]

Here's a hint. Standard deviation will always be a lower number than extreme spread.

One is an average of the spread(SD), and the other is the widest margin between the fastest and the slowest shot(ES).

But I will agree that accuracy trumps spread in velocity, although they often coincide.