The SAECO #58, is a .451 caliber 215gr SWC with a huge meaplate. It was made for bowling-pin shooting from a 1911. The huge meaplate was thought to grab pins better. It’s interesting to me, because it’s about the flattest thing that feeds well. In paper, it cuts clean holes, surrounded by a “torn” halo (like a round-nose leaves) from the more-rounded shoulder.

Montana Bullet Works sells high quality cast SAECO #58 bullets . Missouri Bullet Co. has a coated version called the .45 Express-Grooveless, nominal Brinell 20 hardness.

Lyman Cast Bullet Handbook 4th Ed. says 1.185″ OAL, Remington cases and #2 1/2 primer, bullets sized to 0.451″

START 6.6 grains PowerPistol 880fps @ 13,800 CUP

MAX 7.3 grains PowerPistol 966fps @ 17,600 CUP

I did: Brass Guys (full length resized and mixed) brass, but fired were Winchester headstamp. Rem 2 1/2 primer. .45 Express bullet sized .452. #45.5≈6.6gr Power Pistol. 5″ Les Baer 1911.

LabRadar Series: 120, steel target at ~25 yards, except last 3 where the target was 100 yards.

Velocity: 901 feet per second

Spread: 46 = 923-877=46

StdDev: 12.88 (17x)

Using the Montana Bullet Works slug, and totally unsorted “Brass Guys” brass I got: (NOTE loaded and shot on different day):

LabRadar Series: 38

Velocity: 904

Spread: 47 = 934-887

StdDev: 15.64 (7x)


Universal + 45 Colt

Overall impressions: Universal works pretty well in 45 Colt! The only downside is significant unburned powder at light loadings — enough that it can make rotating the calendar gritty. I did not type up those loads. But for mid-to-high standard-pressure loadings, it works well. Just not remarkably enough to be worth keeping on hand. Currently I like Power Pistol more. It can deliver this performance and do more.

Loaded May 1, 2017

Cartridge: 45 Colt

Firearm: Ruger Blackhawk, 5.5″ Barrel

Brass: Mixed, all 3x fired

Primer: Rem 2½ Large Pistol

Powder: 9.0gr ± 0.1 (#75 on pistol measure) Universal

Bullet: 250gr Speer LSWC

LabRadar Series: 84

Velocity: 1047fps ES: 33 = 1066.47 – 1033.76

StdDev: 10.45 (7x)

Notes: max of 9.2gr @ 941 fps per Speer #14

Powder: 8.0gr ± 0.1 (#67 on pistol measure) Universal

Bullet: 225gr Rim Rock DEWC

LabRadar Series: 85

Notes: Tons of smoke.

Velocity: 1046.7fps (1046, 1041, 1066, 1049, 1050, 1034, 1040)

Red Dot + 45 Colt

👎 So far I’m not impressed. Red Dot has a reputation for being insensitive to position, and is relatively bulky, all good for 45 Colt. But the far more bulky Trail Boss works far better for me in the giant 45 Colt cases.

I used Rem 2 1/2 primers, 7 grains Red Dot, and 155gr SWC or 230gr (LabRadar S117) round-nose from Missouri bullet co.

230 Grain

LabRadar Series: 117, shooting 100 yards.

Velocity: 840fps (855, 825, 836, 884, 808, 831, 838, 861)

Spread: 76fps = 884 – 808

StdDev: 23.62 (8x)

Notes: This had somewhat sharper recoil than I expected. I had trouble keeping it at steel at 100 yards — admittedly it was the end of the night and I was tired, but anecdotally this has poor accuracy. UPDATE: Tried again at the start of another night, and had better luck on steel. Nothing on paper yet.

Winchester 231

Wincheser 231 is a classic (when??) pistol powder “ideally suited to the 38 special, 45 Auto, and 9mm standard loads” advertised to have “consistency, clean burning, low flash”. It is currently made by Hodgdon and identical to HP-38.

There are consistent rumors that Win 231 may be discontinued in the future, because it is more costly to produce than newer powders.

Bottom line: Good, but seems like a bad idea to get attached.


  • Meters well, it has a slick coating and medium-small grains.
  • Low static cling
  • Claims to be flash suppressed
  • Good amount of load data.


  • Likely to be discontinued.
  • Unclear how much historical load data has changed now that HP-38 and 231 are identical.

Density (per Lee dipper chart) 10.7 grains/cc

Redding 3BR Pistol Insert

pistol_insert_number ≈ (grains – 0.226)/0.139

Grains Thrown ≈ 0.139 × pistol_insert_number + 0.226

Pistol Insert # Grains Thrown 10x Throws (Grains)
20 3 30.4-30.8
40 5.75 58.7, 58.5
48 6.9 69.4, 69.5
49 7.0 70.6, 70.8
50 7.15 72.2 (2x)
52 7.5 ???
53 7.6 ???

👎 Aguila Brass

I’ve had bad luck with Aguila brass from loaded ammunition. I have never bought their brass new.

Aguila 45 ACP brass is so thin that it sizes differently.

45 Colt brass had serious problems with split necks. I actually had necks split on the very first reloading. It also had very aggressively chamfered rims, which were noticeably more angular than any other brand I’ve seen. To be clear, that’s not a problem, just an observation. It does make the brass look more streamlined.

152 grain Penn LSWC + 45 ACP

45 ACP using the 152 Grain Semi-Wadcutter Bevel Base “Penn-Maxx” 7th generation bullet. They are supposed to also be accurate at very low speeds.

Rem 2 1/2 primer and Clays @ OAL????????
Clays (Grains) Avg Vel StdDev Notes
3.0 639 43 S93. Never ejected or cycled the slide, but always fully cocked the hammer. Worth investigating with an ultralight action-spring

3.5 738 28 (9x) S94. Mostly cycled, some failure to lock back slide with firm hold.
4.0 833 16.23 (10x) S95. Cycled slide, but failed to lock-back on empty when limp-wresting.
4.5 914 11.2 (10x) S96. Starting to have well-cut holes in paper, but still not totally crisp.

From the table above, Velocity (fps) ≈ 91 + 184*grains_of_clays.

435 Grain Cast Performance + 500 Linebaugh

500 Linebaugh loads using the Cast Performance 435 grain WFNGC “wide flat nose gas check” bullet (sized .511 nose .380 meplat .410″). This is the older version with blue lube.

Because of the gas-check I only pushed these hard. The wide nose and supersonic velocity means a lot of drag (I measured a loss of 2.2 – 2.5 fps/yard). But it also means a lot of damage on impact.

All brass is Starline and previously fired. All loads used CCI 350 primers, to match load data. I seated to the cannelure, not a specific OAL. 7.5″ mag-na-ported barrel.

Charge (grains) Velocity Spread StdDev LabRadar
H110 27 1229 28 = 1244 – 1216 12.64 (5x) S108
Acc. #9 23.9 1216 134 = 1245 – 1111 38.32 (10x) [11.82 removing only min] S109
Acc. #9 24.2 1220 103 = 1255 – 1152 40.74 (5x) S110

Notes: Lots of recoil. Accurate #9 performed well, but sometimes had an unusually weak load.

H110 Notes

H110 is highly reccomended by gunsmiths, but no manual has data for it with this slug. I used 27.0 grains of H110 to start, and felt safe with this because:

Taffin Tests used 27-29 grains of H110 with 440 grain projectiles.

Lee Martin says his “top-end 500 Linebaugh” load is “29.5 of H110 with a 435 WFN”. (Almost certainly the same Cast Performance slug I used.)

Hodgdon says a 468 grain LFP is 31,700PSI with 30.0gr H110 and 35,100 PSI with 31.5gr H110. A 425 GR. LFP (w/GCK) is 29,100 PSI with 31.5gr H110 and 35,200 PS with 33grains.

500 Linebaugh Primers

This thread recommends Winchester WLP for the 500 (supposedly per John Linebaugh himself), because it lowers pressure.

“Brian Pearce shows a 13,500 psi increase from when switching from WLPs to 350s with a 100 fps velocity increase in ruger 45 colt loads using identical charges of enforcer powder.
“. (That’s in a Handloader article)

The CCI350 has always been the other stand-out favorite.


HS-6 is a fine spherical propellant (for) pistol and shotshell. In pistol, 9mm, 38 Super, 40 S&W and 10mm Auto are some of the cartridges where HS-6 provides top performance. In shotshell, HS-6 yields excellent heavy field loadings… Identical to Winchester’s discontinued 540.”

Bottom line: Still evaluating.


  • Good amount of load data.
  • Very fine grains, meters well.


  • Very dense powder (a grain takes up little space) making double or even 3x charges possible.

Density (per Lee dipper chart) 14 grains/cc

Redding 3BR Pistol Insert

pistol_insert_number ≈ 5.44 * Grains – 1.8

Grains Thrown ≈ 0.33 + 0.184 * pistol_insert_number

Pistol Insert # Grains Thrown 10x Throws (Grains)
20 4 41.2
40 7.7 77.8
46 8.8 ???
50 9.5 96.0