338 Spectre loads

Re: 338 Spectre loads

I finally got one built but I cannot find any load data for super sonic loads. Have you tried any that you would be willing to share. The guys at SBR are impossible to get a reply let alone information.

Many thanks!

jfloyd0021 said:

Re: 338 Spectre loads

I finally got one built but I cannot find any load data for super sonic loads. Have you tried any that you would be willing to share. The guys at SBR are impossible to get a reply let alone information.

Many thanks!

Click to expand...

338 Spectre loads.

Left to right:
Maker 165gr
Nosler 185gr
Federal 185gr
Speer 200gr
PPU 250gr
Badlands 265gr
Sierra 300gr
Maker 300gr

The first four are supers while the last four are subs.

I'm pushing the Maker 165gr HV to about 1900fps using small primer brass (thicker); I'm trying to push them to 2000fps and call it a day, lol. I'm using Lil Gun for this load (I lost my data on this but I think it was 18gr or 19gr).

The Nosler AccuBond load is my attempt to mimic SBR's factory load of 1950fps; so far I'm up to 1900fps with WIN296 (again I lost my data so I'm thinking it was about 19.0gr).

The Federal 185gr was a Midway USA special from about 18 months ago; I believe they are 338 Federal overruns. I load these with 17.5gr of SBR SOCOM and they're about at 1460fps.

The Speer Hot-Cor 200gr bullets are my take on the original Norma load for the 10mm Auto (200gr FMJ @ 1200fps). These are actually loaded hotter (14.5gr of WIN296 pushing 1430FPS). I might just keep this load and load up to Norma specs using my favorite 10mm Auto powder, HS-6, if possible.

I do have a box of Barnes TTSX 160gr bullets I'd love to push to 2000fps as well.

My nominal velocity for subs is about 850fps; I don't hunt so I try to charge my loads on the cold side.

The PPU 250gr is an FMJ; it is a boat tail and the first ever bullet I ever reloaded. I run these with 9gr of Lil Gun at about 900fps. Thos bullet is also offered in a HP configuration.

The Badlands bullet is a 265gr solid copper bullet that is 1.957" long. I load these with 9.0gr Lil Gun and to a C.O.A.L. of 2.2860"; they fit my Duramag and ASC mags just fine and feed perfectly.

The Sierra Match King 300gr is a classic 338 projectile. SBR also offers a subsonic load with this projectile but the lot I received from them ran hot and loud. I run these with 9.5gr of IMR4227 at 850fps.

The Maker SUBREX 300gr is a solid copper projectile and very popular among us 338 fans. I'm running these with 9gr of Lil Gun at 1015fps (Paul gave me this recipe and I have used it ever since).

I have a bunch of loads for 338 Spectre, from 160 gr Barnes to 350 gr Maker.
I run the 165 Maker to 2100 fps, 200 gr Speer over 1900 fps, the 350 Msker at 880 fps as a few examples.
I run a 16" barrel on mine.
SR brass handles a bit more pressure, but the LP brass is very accurate with subs, especially the 300 SMK.
Here's the Barnes load SR brass.
I'm gonna try some 224 Valkyrie brass to see how it handles pressure.
I did make these 338 spectre cases out of 224 Valkyrie and 6.5 Grendel...the Grendel case making is not for the average reloader as it takes a good metal lathe with collets...
But the Valkyrie case is easy, with power trimming in a milling machine....will it take a bit more pressure over the SR Spectre case, probably not worth the trouble but I'll find out.