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Joined: Dec 2005
Posts: 2,947 Likes: 1
Campfire Regular
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OP
Campfire Regular
Joined: Dec 2005
Posts: 2,947 Likes: 1 |
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Joined: Feb 2001
Posts: 7,923 Likes: 1
Campfire Outfitter
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Campfire Outfitter
Joined: Feb 2001
Posts: 7,923 Likes: 1 |
First round is done...but pardon my sometimes crappy benchrest technique as it just isn't consistent....tow good shots were usually combined with a called "out"... The two good shots would be right together with the other an inch away...
Federal case neck sized in a Redding die. Flash hole chamfered and neck inside and outside chanfered. After all the brass has been fired one it will be resized and trimmed to one length.
CCI LR Bechrest Primer
Winchester 748 powder each round measured with an electronic scale
Grains/Velocity/two shots/three shots at 100 yard
65 grain Sierra BT SP
32.0/2980/.25/.7 32.5/3070/.55/1.5 33.0/3130/.68/1.8 33.5/3210/.25/1.25
Hornady 75 grain HPBT
28.0/2730/.25/.7 29.0/2775/.3/1.3 29.5/2780/.62/1.25 30.0/2814/.3/.55 30.5/2870/.4/.7 31.0/2910/.4/.7 31.5/3010/.6/1.25
When I did everything correctly three times in a row the gun would shoot under .75 moa....In reality I think this will be consistently around a .4 moa shooter if I do my part......
Neither top load for either bullet showed any pressure signs whatsoever.... I would like to try and make 3100 fps with the Hornady if the accuracy will stay...
If you can not deal with reality, reality will deal with you....
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Joined: Apr 2011
Posts: 15,374 Likes: 13
Campfire Ranger
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Campfire Ranger
Joined: Apr 2011
Posts: 15,374 Likes: 13 |
Semper Fi
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Joined: Feb 2001
Posts: 7,923 Likes: 1
Campfire Outfitter
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Campfire Outfitter
Joined: Feb 2001
Posts: 7,923 Likes: 1 |
Round II:
Federal case neck sized in a Redding die. Flash hole chamfered and neck inside and outside chanfered. After all the brass has been fired one it will be resized and trimmed to one length.
CCI LR Bechrest Primer
Winchester 748 powder each round measured with an electronic scale
Grains/Velocity/two shots/three shots at 100 yard
65 grain Sierra BT SP
34.0/.46/1.15/3190 34.5/.39/1.02/3250 35.0/.38/.76/3270 35.5/.48/.63/3350 36.0/.7/1.18/3390
75 grain Hornady HPBT
32.0/.0/1.25/3000 (first two rounds through the same hole) 32.5/.68/.88/3025 33.0/.34/.50/3040 33.5/.8/1.6/3105 (rifle slid on bag) 34.0/.38/.95/3150
Still zero pressure signs with either load.
If you can not deal with reality, reality will deal with you....
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Joined: Jan 2009
Posts: 31
Campfire Greenhorn
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Campfire Greenhorn
Joined: Jan 2009
Posts: 31 |
I loaded some 50 grain vmax to get mine on paper.. random load of 34.0 g of IMR-4064,, 3 to get on paper, then a 3 shot group.. shot a second group to confirm. Also shot a group of 77 grain tipped match kings.. again, a random load or 34.0 grains of RL-19 loaded at 2.500 I'm working now with the 75 Scirocco, but they are not as easy so far.
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Joined: May 2011
Posts: 15,952 Likes: 2
Campfire Ranger
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Campfire Ranger
Joined: May 2011
Posts: 15,952 Likes: 2 |
Good info, thanks for sharing it with us.
There are 2 rules to success:
1. Never tell everything that you know.
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Joined: Apr 2004
Posts: 42,950 Likes: 16
Campfire 'Bwana
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Campfire 'Bwana
Joined: Apr 2004
Posts: 42,950 Likes: 16 |
My Ruger with the Pac Nor 1 in 7 twist gets fed...
33.3 grains of RL 15, or 4064 or IMR 4895...
Large Rifle primer, usually CCI...
with 75 A Max, BTHP or 80 grain A Max or Match bullets...
velocity is usually right in the 3300 to 3350 fps range out of the rifles 24 inch heavy mag contour barrel...stainless if that matters to anyone...
"Minus the killings, Washington has one of the lowest crime rates in the Country" Marion Barry, Mayor of Wash DC
“Owning guns is not a right. If it were a right, it would be in the Constitution.” ~Alexandria Ocasio Cortez
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Joined: Apr 2006
Posts: 592
Campfire Regular
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Campfire Regular
Joined: Apr 2006
Posts: 592 |
Bump. Interested to see others loads. Have tried H4350 and Hunter with 75 AMAX in my NULA 1 in 8 22-250. Best groups below 3200fps with both and wasn't even able to get to 3200 fps with Hunter at max charge (37.3 gr per email communication from Western). About 3250 fps at 37gr H4350.
Do or do not, there is no try.
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Joined: Jan 2009
Posts: 31
Campfire Greenhorn
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Campfire Greenhorn
Joined: Jan 2009
Posts: 31 |
I had a chance to work a little more with the 75G Swift Scirocco.. I am using RL-17. I shot a string for velocity and got the following with my magneto speed. Sorry the pic is sideways.. using this velocity data I determined I would start at 36.6 grains of RL-17 and shoot variable length at a measured velocity of 33320 fps. I tested at 2.510 .005 off the lands... It did not like this at all. I also tried a long jump of .110, It didn't like this either. 2.405" COAL = 0.110 jump I found the best accuracy with a length to lands (jump) around .055-.080.. These are rough analysis and will get plenty of fine tuning to come. This group is 2.435" COAL Jumping 0.080 And by far the best.. was 2.460, jumping .055 If anyone else is working with the 75 grain swift Scirocco, I would love to her your results. Dan-O
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Joined: Aug 2008
Posts: 1,632 Likes: 1
Campfire Regular
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Campfire Regular
Joined: Aug 2008
Posts: 1,632 Likes: 1 |
80 gr. a max hit the target sideways in mine. Pulled the rest and seated 75 gr. A max and 77 Sierra tmk to try.
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Joined: Dec 2005
Posts: 2,947 Likes: 1
Campfire Regular
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OP
Campfire Regular
Joined: Dec 2005
Posts: 2,947 Likes: 1 |
This is testing mine with 75 gr AMAX and seating them .020 off of the lands. I'm using RL-15, Lapua brass and a CCI 200: 31.3 gr 2919 2926 2906 2921 ES: 20.0 AV: 2918.0 SD: 8.5 31.7 gr 2978 2939 2928 2961 ES: 50.0 AV: 2951.5 SD: 22.4 32.1 gr 2999 3003 2997 2973 ES: 30.0 AV: 2993.0 SD: 13.6 32.5 gr 3009 3033 3020 3012 ES: 24.0 AV: 3018.5 SD: 10.7 32.9 gr 3057 3046 3053 3064 ES: 18.0 AV: 3055.0 SD: 7.5 33.3 gr 3111 3100 3078 3103 ES: 33.0 AV: 3098.0 SD: 14.1
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Joined: Aug 2014
Posts: 604
Campfire Regular
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Campfire Regular
Joined: Aug 2014
Posts: 604 |
Shot mine today with 70 gr Nosler RDF bullets and IMR 4350 38.2 grains and while the accuracy is excellent the speed was lacking. 3079 fps at 1000' since the accuracy is so good the velocity doesnt bother me as much but I am getting a very similar speed with a 26" barreled savage with the same bullet 25 grains of RL 15 in a 223. I am thinking of going to RL17. Like I said the accuracy was great but velocity was lacking.
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Joined: Apr 2008
Posts: 3,831
Campfire Tracker
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Campfire Tracker
Joined: Apr 2008
Posts: 3,831 |
Just did a quick work up for pressure.
75 ELD into the lands and full Lapua case of RL-26 and Fed 210 primer gave me 1" 4 shot group and 3330 fps. Now to play with seating depth to see if I can't tighten it up some.
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Joined: Dec 2005
Posts: 2,947 Likes: 1
Campfire Regular
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OP
Campfire Regular
Joined: Dec 2005
Posts: 2,947 Likes: 1 |
Just did a quick work up for pressure.
75 ELD into the lands and full Lapua case of RL-26 and Fed 210 primer gave me 1" 4 shot group and 3330 fps. Now to play with seating depth to see if I can't tighten it up some. Keep me posted. Interested in seeing results.
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Joined: Apr 2008
Posts: 3,831
Campfire Tracker
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Campfire Tracker
Joined: Apr 2008
Posts: 3,831 |
Just did a quick work up for pressure.
75 ELD into the lands and full Lapua case of RL-26 and Fed 210 primer gave me 1" 4 shot group and 3330 fps. Now to play with seating depth to see if I can't tighten it up some. Keep me posted. Interested in seeing results. Will do...btw ran out of powder space before I hit pressure in my rifle. Waiting for my chassis stock to arrive and drop the rifle in it before I shoot my load work ups.
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Joined: Aug 2014
Posts: 604
Campfire Regular
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Campfire Regular
Joined: Aug 2014
Posts: 604 |
Has anyone tried light bullets at high speeds in their 8 twist tikkas?
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Joined: Sep 2009
Posts: 46,296 Likes: 6
Campfire 'Bwana
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Campfire 'Bwana
Joined: Sep 2009
Posts: 46,296 Likes: 6 |
I'm waiting to see all the dead animal pics shot with the 62 gr TTSX's, I have a loaded e-mail on one of these guns but haven't pulled the trigger yet.
Trump Won!
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Joined: Apr 2004
Posts: 42,950 Likes: 16
Campfire 'Bwana
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Campfire 'Bwana
Joined: Apr 2004
Posts: 42,950 Likes: 16 |
mine is built on a Ruger SA Stainless, that use to be a 243.. so it has no mag block in it..
I've run 75 and 80 grain A Maxes out of it... and 75 grain BTHPs...
The 80 A Max and the 75 BTHPs being the most accurate out of the bunch...
my powder charges are with two powders...33.3 grains of either IMR 4064 or IMR 4895...
bullets seated out to magazine length...MV is 3350 with the 75 grain bullets and 3300 fps with the 80 grainers...
barrel is a Pac Nor Reject, John Noveske did the barrel on it...before he got famous..
Cost me $75 for the barrel, the chambering and mounting it..
one of the more accurate rifles I have around here...
"Minus the killings, Washington has one of the lowest crime rates in the Country" Marion Barry, Mayor of Wash DC
“Owning guns is not a right. If it were a right, it would be in the Constitution.” ~Alexandria Ocasio Cortez
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Joined: Apr 2008
Posts: 3,831
Campfire Tracker
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Campfire Tracker
Joined: Apr 2008
Posts: 3,831 |
Well worked up the RL-26 load. #1 was .000" (in the lands), #2 was .020" out, #3 was .040" out, and #4 was .060" out. Overall none of them are bad, just one is clearly a winner and the 75 grains ELDs like to be in the lands for this rifle. If i can replicate 1/4 or even 1/2 MOA again then 75 ELDs at 3315 fps isn't exactly terrible. As you can see things just went from a nice 1/4 MOA group to an "abysmal" .6" or so for #2 and #3, to a horrid just over MOA for the #4. Going to load some more into the lands tonight and shoot them tomorrow to see how they do. I am digging the little Tikka 22-250 for certain thus far and being able to shooting 100 yards and shoot the loads I just worked up on the bench at 99 yards in the yard is pretty nice these days now that its suppressed.
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Joined: Apr 2008
Posts: 3,831
Campfire Tracker
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Campfire Tracker
Joined: Apr 2008
Posts: 3,831 |
Well I loaded up the same load as #1 above and shot 5 more the following day. Looks to be repeatable accuracy. So I will take it. #1 and #5 are both right at the lands and both well under 1/2 MOA for 5 shots..."that oughta do donkey" So loaded up 65 more at that load...next time out will be flinging them to 1K I hope.
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