BryanF,6.5 PRC 125gr HHT, 24" McGowen, 1-7.5", Suppressed, Peterson Brass, GM215M, 2.955oal, RL 54gr, 3,150fps, SD 15.2, .500 moa
Went to input your data and realized you didn't include which RL powder you used?
BryanF,6.5 PRC 125gr HHT, 24" McGowen, 1-7.5", Suppressed, Peterson Brass, GM215M, 2.955oal, RL 54gr, 3,150fps, SD 15.2, .500 moa
26. sorry!BryanF,
Went to input your data and realized you didn't include which RL powder you used?
109AH | Cci 200 | RL16 |
53 | 3298 | |
53.5 | 3379 | |
54 | 3391 | |
54.5 | 3426 | Light BL |
55 | 3462 | Same |
55.5 | 3467 | Same |
123 AH | Cci200 | RL16 |
52.5 | 3249 | |
53 | 3247 | |
53.5 | 3281 | Light BL |
54 | 3319 | BL |
54.5 | 3333 | Heavy BL |
Ok, I am dumb.CALIBER: 270 WSM
RIFLE: Browning X-Bolt
BULLET: 122gr HHT
POWDER: Alliant RL-16
PRIMER: Federal 215 match
BRASS Norma
COAL: 2.860"
BARREL LENGTH: 23"
TWIST: 10
START CHARGE: 60.0 Grains 3317 FPS
FINISH CHARGE: xxx
CRIMP: Lee Factory. Pretty tight to get crimp into the bullet groove.
had great plans to run load ladder. Had charges from 60.0gr to 64.8gr in 1% increments. Had 4 loaded at 60.0gr to zero and for cleaning shots....new scope and the barrel was thoughly cleaned after the fire forming and barrel break in 100 count.
All 4 of the 60.0gr casings showed .0005" to .001" head growth and a slight ejector circle. No stiff bolt, but I didn't try the 60.6gr round.....call me chicken.
To me, RL-16 seems to be a bit too fast burn for the 122gr HHT. Probably in the wheelhouse for the 116gr AH.
117 HH270 WSM
Browning X-Bolt Speed 23" barrel, 1:10 twist
2.810" COAL, 0.026" jump to rifling
3/8 T Lee FCD
122 HHT
52 degrees F
Norma brass, 1x fired, annealed
Fed GM215M LRM primers
Alliant RL-16
59.7 3281 average 4 shots for cleaning rounds/warmup. group, 0.63"
60.3 3308
60.9 3341
61.5 3373 average 3 shot group, 0.4"
62.1 3398
62.7 vel error, ejector mark, head grew 0.001"
I think there is more speed to be had from this rifle/bullet combo.....if I could find RL-26 :-(
Quickload predicts 61.5gr, 124gr HH length set to 1.295" and weight set to 122gr, 23" barrel the velocity shows 3307....so not that far off. Where I found pressure at 62.7gr, QL shows it at 63,890 psi, or 73 psi over max. QL is just a rough guide.....
View attachment 4475
NZTahr,117 HH
69.5 R19
Fed Mag Primer
2.269 to ogive
3.450fps
22" barrel
Consistently .5 moa
Browning XBolt
Yes, .270WSM. Twist rate 1:10. Brass: WinchesterNZTahr,
Is this also 270 WSM? Twist? Brass?