KT
Silver $$ Contributor
.020 jump seemed to be the sweet spot for my barrel.
184 Hybrid results
- Thread starter savageshooter86
- Start date
KT
Silver $$ Contributor
Richard I did a full work up. I think you will find you might need a little bit more power to get your speeds. Or at least I did.
As a quick test I just changed from 180 to 184's and they shot about 20 fps slower with everything else the same. ES and SD almost exactly the same.
H4350 seem better than 4831sc in 284s?
pat fulghum
( ͡° ͜ʖ ͡°)
284winner
Silver $$ Contributor
9 works
1shot
Gold $$ Contributor
Here are the results, observations and takeaways from a 3x1,000 match 8/3/19.
First, a little background on the rifle system and how I arrived at this point. The barrel is a Bartlein 5R in 8.25 twist. It is a med. Palma contour finished at 32". I'm a sling shooter and the scope on the rifle is a 10-60 March.
All sizing was done on a Co-Ax press with a custom Whidden die. Bullet seating was accomplished via and arbor die cut with my chamber reamer. Powder weight was measured with an A&D FX 120i with auto trickler.
It has been shooting the 183 SMKs' very well and since I won 400 of the Hybrids at the BSWN, I thought I'd give them as close to a heads-to-head test that I could. I need to preface the following load data by saying that A. I moly coat all my bullets, and B. these loads are safe in MY rifle. Please use good sense in trying them.
My "go to" load is 56.5 gr. of RL-23, Tula LR-M primer and the SMK's seated .015" off.
I took that exact loadwith the 184's and played with the seating depth from a .015 jam to .040" off. It was no surprise to find that the hybrids while being very tolerant of seating depth, preferred being jumped .010".
Whether by luck or design, the two bullets B2O measurement are with-in .003" of each other. Basically, the two are interchangeable in my rifle without moving the seating die adjustment.
I quickly settled on a load that was running 2,950 fps. with and ES of 4.
Range conditions were p. sunny with mirage and very light and switching wind building throughout the day. By the 3rd match, mirage was becoming a serious problem, and even dialing down the scope only helped, but didn't solve the problem. I think it was the cause of more vertical on target, as opposed to match two.
My 1st match was a wash as the ShotMarker target I was on, had the wrong target size selected. The target owner had only recently received the unit, and was just learning it. Oooops!
I have posted pics of both the target and the stat box for matches two and three. For a load that was un-tested at 1K, I was happy with both the vertical and the SD of the load.
Conclusion:The hybrids shot virtually the same come-up as the 183"s, however, my "X" count was lower that the Sierras being shot in similar conditions. I found that the Hybrids had a little more B2O variance as well as OAL variance as compared to the Sierras, but I trim/point ALL bullets being shot at 1K, so that is a moot point.
All in all, I think the Hybrid bullets with a little more fine tuning in the seating dept. are capable of much better results than I had yesterday, shrinking the vertical considerably.
I hope this helps,
Lloyd
First, a little background on the rifle system and how I arrived at this point. The barrel is a Bartlein 5R in 8.25 twist. It is a med. Palma contour finished at 32". I'm a sling shooter and the scope on the rifle is a 10-60 March.
All sizing was done on a Co-Ax press with a custom Whidden die. Bullet seating was accomplished via and arbor die cut with my chamber reamer. Powder weight was measured with an A&D FX 120i with auto trickler.
It has been shooting the 183 SMKs' very well and since I won 400 of the Hybrids at the BSWN, I thought I'd give them as close to a heads-to-head test that I could. I need to preface the following load data by saying that A. I moly coat all my bullets, and B. these loads are safe in MY rifle. Please use good sense in trying them.
My "go to" load is 56.5 gr. of RL-23, Tula LR-M primer and the SMK's seated .015" off.
I took that exact loadwith the 184's and played with the seating depth from a .015 jam to .040" off. It was no surprise to find that the hybrids while being very tolerant of seating depth, preferred being jumped .010".
Whether by luck or design, the two bullets B2O measurement are with-in .003" of each other. Basically, the two are interchangeable in my rifle without moving the seating die adjustment.
I quickly settled on a load that was running 2,950 fps. with and ES of 4.
Range conditions were p. sunny with mirage and very light and switching wind building throughout the day. By the 3rd match, mirage was becoming a serious problem, and even dialing down the scope only helped, but didn't solve the problem. I think it was the cause of more vertical on target, as opposed to match two.
My 1st match was a wash as the ShotMarker target I was on, had the wrong target size selected. The target owner had only recently received the unit, and was just learning it. Oooops!
I have posted pics of both the target and the stat box for matches two and three. For a load that was un-tested at 1K, I was happy with both the vertical and the SD of the load.
Conclusion:The hybrids shot virtually the same come-up as the 183"s, however, my "X" count was lower that the Sierras being shot in similar conditions. I found that the Hybrids had a little more B2O variance as well as OAL variance as compared to the Sierras, but I trim/point ALL bullets being shot at 1K, so that is a moot point.
All in all, I think the Hybrid bullets with a little more fine tuning in the seating dept. are capable of much better results than I had yesterday, shrinking the vertical considerably.
I hope this helps,
Lloyd
I’ve had great luck with the 184s . Fired 800 or so .... As Lloyd stated come ups are very similar to Sierra 183 which I used for 2-3 seasons in f class . Running 235 fb and 1-8.5 twist , 15 jump . Running straight 284 with 4350 @ 2790 in 30” barrel . Shehane with 4831sc @ 2890-2900 with 32” . Lot that I have sorted pretty good .
Some targets fired in the back fourty at 650 .
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