.40S&W Double Tap 155 gr Gold Dot vs. Speer 155/165 gr Gold Dot

All information on this page provided by Doctor Gary Roberts

We recently had the opportunity to test the .40 S&W Gold Dot 155 gr JHP loaded by Double Tap Ammunition, along with the .40 S&W Speer Gold Dot 165 gr JHP, as requested by an individual LE officer. These new results are contrasted with the standard .40 S&W Speer 155 gr Gold Dot we previously tested for an LE agency:

.40 S&W Speer 155 gr Gold Dot JHP; Average velocity = 1166 fps (S&W 4006); gel cal= 9.5cm@ 585fps

  Penetration Recovered Diameter Recovered Length Recovered Weight
Bare Gelatin 13.2" 0.64" 0.32" 155.5gr
4-layer denim 16.0" 0.60" 0.44" 155.3gr


.40 S&W Double Tap 155 gr Gold Dot JHP; Average velocity = 1208 fps (S&W 4006); gel cal=10cm@578fps

  Penetration Recovered Diameter Recovered Length Recovered Weight
Bare Gelatin 15.0" 0.66" 0.39" 155.6gr
4-layer denim 17.1" 0.55" 0.42" 155.2gr


.40 S&W Speer 165 gr Gold Dot JHP; Average velocity = 1092 fps (S&W 4006); gel cal=10cm@578fps

  Penetration Recovered Diameter Recovered Length Recovered Weight
Bare Gelatin 15.0" 0.63" 0.37" 165.2gr
4-layer denim 16.5" 0.55" 0.51" 165.4gr


Double Tap 155gr Gold Dot & Speer 165 gr Gold Dot

Both newly tested loads performed adequately, however, there was a noticeable increase in flash, blast, and recoil with the Double Tap ammunition. Neither the Speer 165 gr Gold Dot nor the Double Tap Ammunition 155 gr loading was able to outperform the standard .40 S&W 155 gr Speer Gold Dot loading.

Bottom line, in this test, the DT ammunition offered NO advantages over standard factory ammunition and had the disadvantage of increased flash, blast, and recoil. Pressure testing might be prudent as well.