Jump to content
UKV - The Place for Precision Rifle Enthusiasts
VarmLR

Reload Swiss RS62: Actual V's QL for 6.5 Creedmoor

Recommended Posts

Well I got out today for an hour and shot a few groups.  Working on my technique, (this is my first full bore target rifle).  The best two groups were both 44 gn, one virgin brass one once fired.  both are 10 shot groups, ES and SD were disappointing,

Virgin brass 44gn 
MIN 2693
MAX 2748
AVE 2715  
SD 14
ES 55


Once fired Brass 44 gn
MIN 2695
MAX 2738
AVE 2715
SD 12
ES 43

The Black stickers in the center are 10mm, the groups were shot at 100 Yds.

Pretty happy so far I'm off to the 600 Yd range on Saturday.  I'm Sure the ES will cause me some problems at that range.

Tom

group2.jpg

group1.jpg

Share this post


Link to post
Share on other sites

Good groups but you'll want to firm up ES/SD if stretching legs on distance.  Perhaps try different primers?  I had very reasonable results with Murom Magnum KVB-223M (avoid the standard ones...cup thickness is insufficient).  Remington 7.5s or BR4s also worth a shout.

Thinking a little more on it, you still don't have too many rounds down that new barrel.  My experience with my own TAC was that it took between 300 and 400 rounds before things started getting more consistent.  Also, are you batching your brass and what is your procedure for brass prep?

Share this post


Link to post
Share on other sites

Your spot on with the ES/SD.  Currently I haven't batched brass (I don't have an accurate digital scale and can't face weighing each one on a balance beam yet).

Brass is deprimed using Redding universal deprimer with small pin, wet tumbled in SS media, Annealed using a 'Reloader Brass annealer' Body resized to bump the shoulder 1 to 1.5 thou, Trimmed and chamfered with Lee quick trim ( currently only chamfering as cases are still below SAAMI max) Then Neck sized using Lee collet die (with turned down depriming pin). This give 2 thou of tension.  Bullets are seated with Redding Comp seating die to 30 off the lands. Charges are weighed on RCBS M500 scale. Primers are seated with Sinclair hand tool.

Tom

Share this post


Link to post
Share on other sites

Your regime sounds fine, although it might pay to check case capacities in case you have some that are throwing ES out;  I'd also be tempted to batch by OA case length. I try and keep mine all within the range 1.906 o 1.910 after FL sizing.  If you've done all of that and are confident that charges are accurate, then swapping out primers would seem the next logical step.

Share this post


Link to post
Share on other sites

I was thinking I may have to batch the brass, and I think I'll try the Murom KVB-223M primers if I can find any in this neck of the woods.  Anyone know of a stockist in the South West?

Share this post


Link to post
Share on other sites

#

thanks, but thats still a 5 hour round trip from where I am. and Hazardous delivery charges are extortionate 

Share this post


Link to post
Share on other sites

 In reply to the OP's original entry , I noted a big difference in velocity and pressure signs between my 1st and 2nd tubs of RS62 .

 The same charge weight in my 243 using 87grain Vmax saw a drop in average velocity of 187 fps using the second tub . ( Quite clearly not of the same batch , different containers and a year between purchase. ) This equated to 0.1 grains equalling 31 fps , the velocity confirmed by my chronograph appeared quite linear. I'm sure others must have noticed this !

 I'm not a QL user myself  , but is it possible that QL's data was based on the earlier production runs ?

 

Share this post


Link to post
Share on other sites

I tried RS62 today for the first time in my .260 with the 139gr Scenar and was surprised by the velocity. 

Temp 75F / DA 1385
Three shot average velocity FPS:
44.5gr  2948 SD 11
45.0gr  2978 SD 9 

I wasn’t expecting it to be nearly this fast...should I have been at these loads / is this typical for RS62 ??

Share this post


Link to post
Share on other sites

Compressed loads?  Seems like quite a high charge.  I know that 260 rem has a little more case capacity than Creedmoor but effective case capacity is similar as the bullets tend to be seated deeper.  At 44.6gr I'm into quite compressed loads with the Creedmoor.  I'd expect 2800fps at between 42,5 and 43gr RS62 in the CM with large primer brass so not at all surprised that you're getting those velocities...seems like quite high pressure loadings? If so, I'd be backing right off!

Share this post


Link to post
Share on other sites
1 hour ago, VarmLR said:

Compressed loads?  Seems like quite a high charge.  I know that 260 rem has a little more case capacity than Creedmoor but effective case capacity is similar as the bullets tend to be seated deeper.  At 44.6gr I'm into quite compressed loads with the Creedmoor.  I'd expect 2800fps at between 42,5 and 43gr RS62 in the CM with large primer brass so not at all surprised that you're getting those velocities...seems like quite high pressure loadings? If so, I'd be backing right off!

Don’t think so. Def no crunch on bullet seating and I load them pretty long ie over 2.90” OAL. 

I was just testing a couple of loads and will be backing down. Thx

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

RifleMags_200x100.jpg

Northallerton NSAC shooting.jpg

border_ballistics_UKV_ad.jpg

dolphin button4 (200x100).jpg

CASEPREP_FINAL_YELLOW_hi_res__200_.jpg

rovicom200.jpg

BHTargets200.jpg

Lumensmini.png

CALTON MOOR RANGE (2) (200x135).jpg

bradley1 200.jpg

NVstore200.jpg

Danny Trowsdale 200.png

safeshot 200.jpg

tacfire 200.jpg

blackrifle.png

jr_firearms_200.gif

valkyrie 200.jpg

tab 200.jpg

 

 



×

Important Information

By using this site, you agree to our Terms of Use and Privacy Policy