Haven't seen this improvement of the p550 gun:

`x = 80, y = 76, rule = LifeHistory`

32.2A$31.A.A$25.2A4.A$23.A2.A2.2A.4A$23.2A.A.A.A.A2.A$26.A.ABABAB$26.

A.AB2AB$27.AB.2B$30.3B$30.4B6.2A$28.3B2AB6.A$19.A8.3B2AB3.BA.A$17.3A

6.10B.B2A$16.A8.13B$15.A.A6.14B$14.BA.A5.15B$13.3BA5.4B2.8B$11.4B6.4B

5.6B$9.6B5.4B4.9B$8.7B4.4B5.2A4.4B$.B.4B.8B2.4B7.A5.4B$2AB.17B5.3A7.

4B$2A18B6.A10.4B$.2B.16B18.4B$4.16B19.4B$5.15B20.4B$6.12B.B2A19.4B$6.

11B2.BA.A19.4B$7.10B5.A20.4B$7.6B2A2B5.2A20.4B$7.6B2A3B27.4B$7.10B29.

4B$3.A.2AB.8B30.4B$.3AB2AB3.7B30.4B$A4.B6.6B31.4B$.3A.2A4.6B33.4B$3.

2A2.A4.5B34.4B$6.A.A.8B34.4B$2.A.2A.A.A8B8.A26.4B$2.2A.A.BA2B.6B6.3A

27.4B$5.A2.2B2.7B4.A31.4B$5.2A.B3.7B4.2A31.4B$3.2A2.A.A2.8B.4B32.4B$

2.A2.A2.2A2.11B35.4B$3.2A7.12B35.4B$12.12B36.4B10.A$13.11B37.4B7.3A$

16.7B39.4B5.A$15.8B7.2A31.4B4.2A$14.9B7.A14.A18.9B$12.B.9B4.BA.A12.3A

17.8B$8.2A.2A13B.B2A12.A14.2A3.11B$9.A.A.B.13B14.2A14.A4.11B$8.A2.A.A

14B12.4B14.A.AB.11B$8.2A2.2A.B.11B11.3B17.2AB.12B$17.10B12.4B18.5BA8B

$16.11B11.5B8.2A8.4B3A8B$10.2A3.12B11.6B8.A8.3B2A2BA7B$10.A2.A20B2.8B

8.A.AB6.6B2A6B$12.2A2.29B8.2AB.3B3.6BA7B$16.28B11.15BA6B$18.17B.7B12.

12B3A6B$16.28B12.7BAB2ABA7B2A$16.2A3.2B2.19B11.10B3A8BA.A$17.A10.17B

8.20B5.A$14.3A13.15B.2B2.20B.B6.2A$14.A16.38B$31.8B.20B.7B$29.8B3.2B

2A16B2.6B$29.2A3.B5.2B2A16B3.6B$30.A10.18B6.4B$27.3A12.B.3B.4B12.B2A

2B$27.A19.4B14.2A.B2A$46.A3B18.BA.A$45.A3B22.A$45.3A23.2A!

EDIT: Or this p572:

`x = 80, y = 80, rule = LifeHistory`

35.2A$34.A.A$28.2A4.A$26.A2.A2.2A.4A$26.2A.A.A.A.A2.A$29.A.ABABAB$29.

A.AB2AB$30.AB.2B$33.3B$33.4B6.2A$31.3B2AB6.A$31.3B2AB3.BA.A$29.10B.B

2A$28.13B$19.A7.14B$17.3A6.15B$16.A8.4B2.8B$15.A.A6.4B5.6B$14.BA.A5.

4B4.9B$13.3BA5.4B5.2A4.4B$11.4B6.4B7.A5.4B$9.6B5.4B5.3A7.4B$8.7B4.4B

6.A10.4B$.B.4B.8B2.4B19.4B$2AB.17B21.4B$2A18B23.4B$.2B.16B24.4B$4.16B

25.4B$5.15B26.4B$6.12B.B2A25.4B$6.11B2.BA.A25.4B$7.10B5.A26.4B$7.6B2A

2B5.2A26.4B$7.6B2A3B33.4B$7.10B35.4B$3.A.2AB.8B36.4B$.3AB2AB3.7B36.4B

$A4.B6.6B37.4B$.3A.2A4.6B39.4B$3.2A2.A4.5B40.4B$6.A.A.8B40.4B5.B$2.A.

2A.A.A8B8.A32.4B3.3B$2.2A.A.BA2B.6B6.3A33.4B2.4B3.A$5.A2.2B2.7B4.A37.

4B.5B.A.A$5.2A.B3.7B4.2A37.10B.A$3.2A2.A.A2.8B.4B38.10B$2.A2.A2.2A2.

11B41.9B$3.2A7.12B41.7B$12.12B41.8B$13.11B39.11B$16.7B39.12B$15.8B7.

2A30.12B$14.9B7.A14.A17.11B3.BA$12.B.9B4.BA.A12.3A18.13BABA$8.2A.2A

13B.B2A12.A21.13BABA$9.A.A.B.13B14.2A19.13B.BA$8.A2.A.A14B12.4B18.4BA

8B$8.2A2.2A.B.11B11.3B18.5BABA6B$17.10B12.4B15.6B2AB2A2B5.2A$16.11B

11.5B8.2A5.6BA2B2AB6.A$10.2A3.12B11.6B8.A6.5B2ABA3B2.BA.A$10.A2.A20B

2.8B8.A.AB5.4B3A4B.B2A$12.2A2.29B8.2AB.3B.5B4A4B$16.28B11.10B2ABAB2A

2B$18.17B.7B12.13BA4B$16.28B12.8BA4B2A2B$16.2A3.2B2.19B11.9BABA5B$17.

A10.17B8.18B$14.3A13.15B.2B2.21B$14.A16.40B$31.8B.20B.9B$29.8B3.2B2A

16B2.B3A2B$29.2A3.B5.2B2A16B3.5B$30.A10.18B5.B.3B$27.3A12.B.3B.4B11.

3BA3B$27.A19.4B12.A.A.A2.A$46.4B11.3A.A.4A$45.A3B11.A5.A$44.A3B12.2A

6.A$43.B3A20.2A!

Or this p501:

`x = 77, y = 66, rule = LifeHistory`

30.2A$29.A.A$23.2A4.A$21.A2.A2.2A.4A$21.2A.A.A.A.A2.A$24.A.ABABAB$24.

A.AB2AB$25.AB.2B$28.3B$19.A8.4B6.2A$17.3A6.3B2AB6.A$16.A8.4B2AB3.BA.A

$15.A.A6.10B.B2A$14.BA.A5.13B$13.3BA5.14B$11.4B6.15B$9.6B5.4B2.8B$8.

7B4.4B5.6B$.B.4B.8B2.4B4.9B$2AB.17B5.2A4.4B$2A18B7.A5.4B$.2B.16B4.3A

7.4B$4.16B4.A10.4B$5.15B16.4B$6.12B.B2A15.4B$6.11B2.BA.A15.4B$7.10B5.

A16.4B$7.6B2A2B5.2A16.4B$7.6B2A3B23.4B$7.10B25.4B$3.A.2AB.8B26.4B$.3A

B2AB3.7B26.4B$A4.B6.6B27.4B$.3A.2A4.6B29.4B12.A$3.2A2.A4.5B30.4B11.3A

$6.A.A.8B30.4B13.A$2.A.2A.A.A8B31.4B11.2A$2.2A.A.BA2B.6B7.2A23.4B10.

5B6.2A$5.A2.2B2.7B6.A25.4B11.4B5.A$5.2A.B3.7B3.BA.A26.4B9.6B.BA.A$3.

2A2.A.A2.8B2.B2A28.4B7.7B.B2A$2.A2.A2.2A2.11B31.4B4.11B$3.2A7.11B32.

4B3.11B$12.11B33.17B$13.11B28.2A3.15B$16.7B9.2A19.A4.13B$15.8B4.2A3.A

.A18.A.AB2.12B2.2A$14.8B5.A6.A19.2AB.15BA.A$15.7B2.BA.A6.2A20.16B3.A$

14.9B.B2A8.B20.16B3.2A$14.11B10.3B19.15B$14.11B9.6B16.15B$12.2AB.9B.B

3.B2.10B11.17B$11.A.AB2.6BA20B3.2B2.20B$11.A5.5BABA4B2A6B2A31B$10.2A

5.12BABA5B2A22B.7B$17.7BA6BA29B2.6B$16.8BA3BAB2A29B3.6B$15.5BA3BA2B2A

31B6.4B$14.4B2.4BA2.B2A5.13B.4B12.B2A2B$13.4B3.A3B2A3.3B3.7B.B5.3B14.

2A.B2A$12.4B5.2ABA5.2A15.4B18.BA.A$11.A3B9.AB4.A16.2A23.A$10.A3B9.BA

2B4.3A14.A23.2A$9.B3A10.A.A7.A11.3A$24.A20.A!

A few others in a family:

`#C p539`

x = 82, y = 67, rule = LifeHistory

31.2A$30.A.A$24.2A4.A$22.A2.A2.2A.4A$22.2A.A.A.A.A2.A$25.A.ABABAB$25.

A.AB2AB$26.AB.2B$29.3B$29.4B6.2A$19.A7.3B2AB6.A$17.3A6.4B2AB3.BA.A$

16.A8.10B.B2A$15.A.A6.13B$14.BA.A5.14B$13.3BA5.15B$11.4B6.4B2.8B$9.6B

5.4B5.6B$8.7B4.4B4.9B$.B.4B.8B2.4B5.2A4.4B$2AB.17B7.A5.4B$2A18B5.3A7.

4B$.2B.16B5.A10.4B$4.16B17.4B$5.15B18.4B$6.12B.B2A17.4B$6.11B2.BA.A

17.4B$7.10B5.A18.4B$7.6B2A2B5.2A18.4B$7.6B2A3B25.4B$7.10B27.4B$3.A.2A

B.8B28.4B$.3AB2AB3.7B28.4B$A4.B6.6B29.4B$.3A.2A4.6B31.4B$3.2A2.A4.5B

32.4B$6.A.A.8B32.4B$2.A.2A.A.A8B33.4B$2.2A.A.BA2B.6B7.2A25.4B$5.A2.2B

2.7B6.A27.4B15.2A$5.2A.B3.7B3.BA.A28.4B14.A$3.2A2.A.A2.8B2.B2A30.4B

10.BA.A$2.A2.A2.2A2.11B33.4B2.6B.B2A9.A$3.2A7.11B34.13B9.3A$12.11B35.

13B7.A$13.11B28.2A5.11B.5B2.2A$16.7B9.2A19.A6.16B.3B$15.8B4.2A3.A.A

18.A.AB4.17B$14.8B5.A6.A19.2AB.3B.17B$15.7B2.BA.A6.2A20.24B$14.9B.B2A

8.B20.23B$14.11B10.3B19.20B$14.11B9.6B16.17B.3B$12.2AB.9B.B3.B2.10B

11.18B3.B$11.A.AB2.6BA20B3.2B2.21B$11.A5.5BABA4B2A6B2A32B$10.2A5.12BA

BA5B2A22B.9B$17.7BA6BA29B2.7B$16.8BA3BAB2A29B3.5B$15.5BA3BA2B2A31B5.

4B$14.4B2.4BA2.B2A5.13B.4B10.4B.B2A$13.4B3.A3B2A3.3B3.7B.B5.3B11.2A3.

BA.A$12.4B5.2ABA5.2A15.4B13.A6.A$11.A3B9.AB4.A16.2A12.3A7.2A$10.A3B9.

BA2B4.3A14.A12.A$9.B3A10.A.A7.A11.3A$24.A20.A!

`#C p511`

x = 79, y = 68, rule = LifeHistory

32.2A$31.A.A$25.2A4.A$23.A2.A2.2A.4A$23.2A.A.A.A.A2.A$26.A.ABABAB$26.

A.AB2AB$27.AB.2B$30.3B$30.4B6.2A$28.3B2AB6.A$19.A8.3B2AB3.BA.A$17.3A

6.10B.B2A$16.A8.13B$15.A.A6.14B$14.BA.A5.15B$13.3BA5.4B2.8B$11.4B6.4B

5.6B$9.6B5.4B4.9B$8.7B4.4B5.2A4.4B$.B.4B.8B2.4B7.A5.4B$2AB.17B5.3A7.

4B$2A18B6.A10.4B$.2B.16B18.4B$4.16B19.4B$5.15B20.4B$6.12B.B2A19.4B$6.

11B2.BA.A19.4B$7.10B5.A20.4B$7.6B2A2B5.2A20.4B$7.6B2A3B27.4B$7.10B29.

4B$3.A.2AB.8B30.4B$.3AB2AB3.7B30.4B$A4.B6.6B31.4B$.3A.2A4.6B33.4B$3.

2A2.A4.5B34.4B$6.A.A.8B34.4B$2.A.2A.A.A8B35.4B$2.2A.A.BA2B.6B7.2A27.

4B$5.A2.2B2.7B6.A29.4B7.2A$5.2A.B3.7B3.BA.A30.4B5.B2AB$3.2A2.A.A2.8B

2.B2A32.4B5.3B$2.A2.A2.2A2.11B35.4B3.B.B$3.2A7.11B36.4B.6B$12.11B37.

10B7.2A$13.11B28.2A7.9B7.A$16.7B9.2A19.A8.10B2.BA.A$15.8B4.2A3.A.A18.

A.AB6.10B.B2A$14.8B5.A6.A19.2AB.3B2.12B$15.7B2.BA.A6.2A20.19B$14.9B.B

2A8.B20.19B$14.11B10.3B19.18B$14.11B9.6B16.19B$12.2AB.9B.B3.B2.10B11.

19B.B2A$11.A.AB2.6BA20B3.2B2.21B2.BA.A$11.A5.5BABA4B2A6B2A32B6.A$10.

2A5.12BABA5B2A31B7.2A$17.7BA6BA29B.8B$16.8BA3BAB2A29B3.6B$15.5BA3BA2B

2A31B5.5B$14.4B2.4BA2.B2A5.13B.4B13.4B$13.4B3.A3B2A3.3B3.7B.B5.3B13.B

2A2B$12.4B5.2ABA5.2A15.4B15.2A$11.A3B9.AB4.A16.2A$10.A3B9.BA2B4.3A14.

A$9.B3A10.A.A7.A11.3A$24.A20.A!

`#C p529`

x = 77, y = 76, rule = LifeHistory

38.2A$37.A.A$31.2A4.A$29.A2.A2.2A.4A$29.2A.A.A.A.A2.A$32.A.ABABAB$32.

A.AB2AB$33.AB.2B$36.3B$36.4B6.2A$34.3B2AB6.A$34.3B2AB3.BA.A$32.10B.B

2A$31.13B$30.14B$29.15B$28.4B2.8B$19.A7.4B5.6B$17.3A6.4B4.9B$16.A8.4B

5.2A4.4B$15.A.A6.4B7.A5.4B$14.BA.A5.4B5.3A7.4B$13.3BA5.4B6.A10.4B$11.

4B6.4B19.4B$9.6B5.4B21.4B$8.7B4.4B23.4B$.B.4B.8B2.4B25.4B$2AB.17B27.

4B$2A18B29.4B$.2B.16B30.4B$4.16B31.4B$5.15B32.4B$6.12B.B2A31.4B$6.11B

2.BA.A31.4B$7.10B5.A32.4B$7.6B2A2B5.2A32.4B$7.6B2A3B39.4B$7.10B41.4B$

3.A.2AB.8B42.4B$.3AB2AB3.7B42.4B$A4.B6.6B43.4B$.3A.2A4.6B45.4B$3.2A2.

A4.5B46.4B$6.A.A.8B46.4B$2.A.2A.A.A8B47.4B$2.2A.A.BA2B.6B7.2A38.4B$5.

A2.2B2.7B6.A39.5B$5.2A.B3.7B3.BA.A38.9B$3.2A2.A.A2.8B2.B2A39.9B$2.A2.

A2.2A2.11B41.9B$3.2A7.11B40.10B$12.11B39.12B$13.11B28.2A8.13B$16.7B9.

2A19.A9.11B$15.8B4.2A3.A.A18.A.AB4.12B$14.8B5.A6.A19.2AB.15B$15.7B2.B

A.A6.2A20.17B$14.9B.B2A8.B20.17B$14.11B10.3B19.17B.B$14.11B9.6B16.19B

2A$12.2AB.9B.B3.B2.10B11.19B.B2A$11.A.AB2.6BA20B3.2B2.20B4.B$11.A5.5B

ABA4B2A6B2A32B$10.2A5.12BABA5B2A22B.9B$17.7BA6BA29B2.7B$16.8BA3BAB2A

29B2.7B$15.5BA3BA2B2A31B4.6B$14.4B2.4BA2.B2A5.13B.4B10.7B$13.4B3.A3B

2A3.3B3.7B.B5.3B12.6B$12.4B5.2ABA5.2A15.4B13.7B$11.A3B9.AB4.A16.2A15.

6B$10.A3B9.BA2B4.3A14.A15.5B$9.B3A10.A.A7.A11.3A15.6B$24.A20.A17.4B$

63.2B2AB$65.2A!