• If you are being asked to change your password, and unsure how to do it, follow these instructions. Click here

Piercision Rifles 300 WSM

rpierce

Official LRH Sponsor
Joined
Oct 8, 2009
Messages
866
Location
Waucoma, IA
Well load testing is done on my new 300 WSM I did on a long action Defiance ANTIX with a 23" Benchmark carbon barrel. Running a 215 berger at a mild 2685 fps and a ES of 8-12 fps for 10-18 shots. Most consistent load Ive tested PERIOD. Using .005 neck tension. Powder charge node is almost a grain wide. Did a seating depth test and had 5" vertical for 18 shots at 840 yds. 3 shots per seating depth. Most were 3" or less vertical at 840 yds. .029-.032 off shot the smallest though. This rifle and load has shot a pile of awesome groups already. Every time I take it to my 840 yd target its under 1/2 moa vertical.

Rifle has the following:
Defiance ANTIX
Manners LRH in high plains camo
Benchmark 23" 9.0 tw sendero light
Hawkins Hunter bottom metal and 3 round flush mag w spacer
Triggertech Diamond set at 1.5 lbs
Nightforce ATACR 4-20
TBAC Dominus SR suppressor
MDT lightweight double pull bipod.

Weighs 9 lbs 12 oz with optics and no suppressor or bipod. 10 lbs 10 oz with suppressor.
My goal for this rifle was to have a mild and stupid accurate load in the 300 wsm so I would get 2000+ rounds of benchrest accuracy out of it. The powder Im running is cool burning and clean. Ive had almost zero throat erosion so far. In the neighborhood of 15xs less throat erosion than a 28 nosler would at this point. The 215 at 2685 FPS still has enough energy to take elk at 900+ yds. And the difference in wind drift between the 215 at 2685 FPS and the bigger magnums isn't as much as youd think. You cant shoot or call the difference in wind. Only difference between the wsm and my norma improved would be down range energy.

www.piercisionrifles.com
345239612_1488849011883258_7642183152472748459_n.jpg
345128109_2280080885504712_5411334952712632272_n.jpg
345078196_642095494491601_5102000204252988711_n.jpg
345128131_919941365758804_2131474101227213847_n.jpg
300 wsm 100 yds.jpg
3 shots at 580 yds wsm.jpg
840 yds.jpg
4@840 wsm.jpg
 
Very nice shooting and good looking rifle !
I have found my WSM likes more neck tension than my other rifles. Are you setting the .005 with just a bushing die ?
Mandrel ?
 
Very nice shooting and good looking rifle !
I have found my WSM likes more neck tension than my other rifles. Are you setting the .005 with just a bushing die ?
Mandrel ?
Thank you. Yes. Im running a bushing, no mandrel. Running the neck into graphite lube after sizing and then running it through a nylon brush to remove the majority of the graphite. Too much lube and groups and ES doubled.
 
Well I decided to send a few more rounds at my 840 yd plate this morning with my 300 WSM. 4 shots measured 2.559"/.29 moa @ 840 yds. Vertical was 1.687"/.191 moa. I woulda sent the 5th shot but the wind picked up when I was getting ready to send it. Looks like 5 shots on the target but one of em is from a previous group that was painted over. Not bad for a 20x scope off a bipod. Shes a tack driver.
840 yd 4 shot.jpg
840 yds 4 shots.jpg
 
Heres a sweet little compact 300 WSM tack driver that I finished up this week for a customer. Has a 22" barrel on it. It ended up tuning at 2660 fps with a 215 berger. Barrel hasn't sped up yet. I shot it at 100 and then opened a new jug of powder for it as the customer is taking 24 lbs with the rifle. Had to tweak the load .3 gr from the usual amount due to a different lot. Got it in tune quick and sent a 3 round group at 890 yds that measured 2.195"/.23 moa @890 yds. Vertical was .816"/.087 moa at 890 yds. Was a little bit of a quartering breeze and I had 4 moa of wind on.

Rifle has the following:
Defiance ANTIX
Benchmark Barrels 30 cal 9.0 tw 22" sendero light
Manners LRH
Triggertech Special set at 1.5 lbs
Hawkins Hunter bottom metal and mag
Nightforce 4-20 ATACR bedded into NF 4 screw rings

Rifle weighs 9 lbs 3 oz without the bipod.

Spotting hits with a suppressor was a breeze.


parts are on the shelf for builds and complete rifle will be instock soon

426241308_930277158629826_9201929553256697128_n.jpg
427711852_928351592134429_4839696068486867242_n.jpg
427101234_924682172535570_8206357826398773960_n.jpg
426819129_1525360268306260_576057041722360169_n.jpg
426742643_417879980680131_1827385152423287532_n.jpg
426363985_329483952819225_3286350918194880261_n.jpg
426978183_1713162422509547_2752669171500828811_n.jpg
 
Top