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Topic: Load Development for Tikka CTR 6.5 Creedmoor (Read 255 times) previous topic - next topic

Load Development for Tikka CTR 6.5 Creedmoor

This would be my first post.  I appreciate the wealth of knowledge available and contributing members on this forum.  Thank you.

I've loaded many thousands of .40 S&W and 9mm for USPSA via my Dillon 650, however I haven't loaded any rifle ammo until about a month ago.  Most of my equipment came at the recommendation of this and other forums. 

Rifle;

Tikka CTR 6.5CM
MPA BA Comp Chassis
Vortex Razor Gen II 4.5 - 27
Spuhr 20moa mount
Area 419 Sidewinder

Equipment;

Redding Big Boss II (Forester Co-Ax still on backorder)
Redding Type S FL (.288 bushing) and seating die (I have about .001 of neck tension)
21st Century 6.5cm expander mandrel 
 
Ingredients;

H4350
6.5 CM Lapua Brass
CCI small rifle primers
140gr ELD-M
COAL 2.92"

Loaded 41.5, 41.8, 42.1, 42.4, 42.7, and 43.0gr.  Velocities improved about 30fps per .3gr increments with SD and ES also improving.

H4350 41.5gr
Avg. 2628
SD 34.45

H4350 41.8gr
Avg. 2669
SD 6.96

H4350 42.1
Avg. 2673
SD 5.66
ES 12

H4350 42.4
Avg. 2695
SD 9.13
ES 27

H4350 42.7
Avg. 2719
SD 4.26
ES 10

H4350 43.0
Avg. 2738
SD 5.76
ES 15

I didn't notice any pressure signs, other than the bolt lift may have been slightly sticky at 43.0gr of H4350.  Thinking I'm going to run some more 42.7's, 43.0's, and 43,3's to confirm results.  What's the opinion on the SD and ES's?  Velocities are a bit slow, but that seems to be the norm with Tikka's.

I'm going to try some RL-16 as I've heard good things.  Looking for more velocities.  Would like to see 2800fps or faster. 

I use a Redding Type S FL without the expander ball with a .288 bushing.  Outside diameter measures .288 before the expander mandrel.  After expander mandrel I see about .289 outside diameter.  Once a round is seated I see .290.  Do I have .001 or .002 of neck tension?

Thanks guys.

Zach


 

Re: Load Development for Tikka CTR 6.5 Creedmoor

Reply #1
welcome to the forum nutzach… I have a tika t3x lite (hunting rifle)… 24 inch sporter barrel... it too is slow... but shoots great... I wouldn't worry about getting to 2800 with your tikka... chances are it wont get there without being over pressured... if its still new it will speed up some as you put rounds down it... but if you get it shooting good in the upper 2600's or lower 2700's it will do any thing you want it to do... accuracy trumps speed... with your numbers it looks like your getting a .001 neck tension... with your loads I would explore around 41.8 to 42.1... think you will find little bitty groups right in there... 
Grant

Re: Load Development for Tikka CTR 6.5 Creedmoor

Reply #2
You don’t need any help. You’re doing a great job already. Just keep paying attn to point impact too. It’s just as important as SD and ES.

Re: Load Development for Tikka CTR 6.5 Creedmoor

Reply #3
I wouldn't be concerned with velocity boundaries either. There is no magical number so I don't chase it.
41.8 looks promising and without knowing any more details I'd consider looking at your seating depth.
It's not what you take when you leave this world behind you. It's what you leave behind you when you go.

Re: Load Development for Tikka CTR 6.5 Creedmoor

Reply #4
I would agree you seem to have a pretty good handle on it.

Slight bolt lift IS high pressure, it doesn't mean you're getting close. Your brass will thank you later to back down to the 41.8 - 42.4 area.

You've isolated a good node now so I would put the chronograph away and concentrate on tuning the load where the gun wants to shoot regardless of chrono numbers.

I'd do a thorough seating depth test then retune powder at the optimum seating depth then try a few different primers with that load to make sure there's nothing left on the table in that department.
Dave

Re: Load Development for Tikka CTR 6.5 Creedmoor

Reply #5
Thank you all for the comments.  I have a bit more fine running to do and some group shooting next.  Was hoping to get out later this week, but records amount of rainfall might prevent that for awhile. 

I have a bit more shooting to do in the upper 42gr of H4350.  I’d like to see 2700fps.  I also have some 147 ELD M’s to try out.  The Hornady Factory 147 ELD M shoot .5moa.  That’s the benchmark.  Got to keep them that tight.